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Free-Online-Calculator-Use.com

Online Calculator Blog

Welcome to the Free Online Calculator Use blog page. Subscribing to this blog lets you know whenever a new calculator has been added to the site, or when an existing calculator has been updated or upgraded.

To subscribe to my calculator blog (no email necessary), right-click on the orange RSS button (see buttons in lower, left-hand column) and then paste the URL into your RSS reader. Or, click on the My Yahoo! button, My MSN button, or Add to Google button if you keep a personalized home page at one of those sites.

You can also be alerted to new and updated calculators by following me on either Facebook, Twitter, or Google Plus, or by subscribing to my Monthly Whats New email update (follow buttons and subscription form in right-hand column).

Dec 02, 2016

Bond Value Calculator Now Shows Its Work!

Bond Value Calculator

In response to a popular request, I have now added "the math" to the Bond Value Calculator.

This means the calculator's page now includes the bond valuation formula, along with an example showing how to calculate the value of a bond using the formula.

Plus, the calculated results now includes the step-by-step math used to arrive at the bond price, as well as a chart showing how the present values of the par value and coupon payments add up to the calculated price.

As always, please use the expandable feedback form beneath the calculator to let me know if you discover any issues and/or have any suggestions for improvements.

Thank you!

-Dan

P.S. The update was also added to the mobile version if you are accessing from a small-screen device, and to the Ad-Free Member Version if you wish to save your entries in between visits.

Continue reading "Bond Value Calculator Now Shows Its Work!"

Oct 22, 2016

Update: Two New Features Added to Paycheck Calculator!

Free Online Paycheck Calculator

I have now updated this popular calculator to include two often requested features.

State Tax Rate Lookup Feature

The calculator now has a state drop-down menu on the State tax rate line.

So, instead of having to look up your state tax rate, you can now just select your state and have the calculator look up your state rate for you.

Plus, the calculator will even display your state's tax table along with your annualized gross pay!

Paycheck Breakdown Percentage Feature

In addition to the pie chart that displays the breakdown of your gross pay, each slice's title is now followed by the percentage it represents.

As always, please use the expandable feedback form beneath the calculator to let me know if you discover any issues and/or have any suggestions for improvements.

Thank you!

-Dan

P.S. The update was also added to the mobile version if you are accessing from a small-screen device, and to the Ad-Free Member Version if you wish to save your entries in between visits.

Continue reading "Update: Two New Features Added to Paycheck Calculator!"

Oct 13, 2016

New! School Calendar Calculator for Calculating Class Days Left

School Calendar Calculator Image

This new school calendar calculator will calculate the number of class days remaining in the school year.

Simply select the starting and ending dates and the calculator will generate an interactive school calendar wherein you can exclude "no school" days based on your own school's calendar.

Plus, the calculator even provides a printer friendly calendar with the number of days-left displayed in each date cell!

As always, please use the expandable feedback form beneath the calculator to let me know if you discover any issues and/or have any suggestions for improvements.

Thank you!

-Dan

P.S. The new calculator was also added to the mobile version if you are accessing from a small-screen device, and to the Ad-Free Member Version if you wish to save your entries in between visits.

Continue reading "New! School Calendar Calculator for Calculating Class Days Left"

Sep 27, 2016

Update: New Features Added To Extra Payment Mortgage Calculator!

Extra Payment Mortgage Calculator

Thanks to your excellent feedback, here are two new features I just finished adding to the popular Extra Payment Mortgage Calculator:

Weekly Extra Payment Field: In addition to one-time, monthly, and annual, you can now enter a weekly extra payment amount.

Printer Friendly Report: After clicking the "Calculate Extra Mortgage Payment Savings" button, a printer friendly report button will display in the results. Clicking this button will open a full report in a printer friendly window.

As always, please use the expandable feedback form beneath the calculator to let me know if you discover any issues and/or have any suggestions for improvements.

Thank you!

-Dan

P.S. The update was also added to the mobile version if you are accessing from a small-screen device, and to the Ad-Free Member Version if you wish to save your entries in between visits.

Continue reading "Update: New Features Added To Extra Payment Mortgage Calculator!"

Sep 23, 2016

New! Student Loan Repayment Calculator For Up To 24 Loans!

Student Loan Repayment Calculator Image

This calculator was born out of an email I received from a Financial Aid Director of a large public university who was in search of a good calculator for parents and students to use. Of course, I couldn't resist when she accepted my request for her guidance.

Unlike other online student loan calculators that only handle 1 loan at a time, this new Student Loan Repayment Calculator will handle up to 24 separate loans (up to 4 loans per year for up to 6 years).

The new calculator will accommodate subsidized, unsubsidized, PLUS, and private loans, and allows you to play with the payment amounts to see how much interest you could save by paying more than the minimums.

And for unsubsidized loans you can even choose to begin making principal and interest payments right away, or just interest payments, or have the accruing interest added to the loan balance (interest capitalization).

Finally, you can either view and print a combined loan payment schedule for all loans, or a loan payment schedule for each individual loan.

As always, please use the expandable feedback form beneath the calculator to let me know if you discover any issues and/or have any suggestions for improvements.

Thank you!

-Dan

P.S. The new calculator was also added to the mobile version if you are accessing from a small-screen device, and to the Ad-Free Member Version if you wish to save your entries in between visits.

Continue reading "New! Student Loan Repayment Calculator For Up To 24 Loans!"

Sep 05, 2016

New! All-Possible-Combinations Calculator

Combination Calculator Image

Not sure if this calculator will be useful for anyone else, but after receiving the following from a site visitor I just couldn't pass up the challenge of making one that would accommodate the visitor's needs.

I want the 24 combinations for the numbers 9567. I would like the numbers in a list collated with the lowest to the highest. Hope you can direct me to the right calculator.

Done!

This new combinations calculator will accept any combination of up to 6 numbers, letters, or a combination of both (123456, ABCDEF, or 1A2B3C), and then generate a list of all possible combinations -- sorted to your preference.

Why limit the characters to 6? Because any more than 6 characters generates a result with more than 5,000 possible combinations.

Any guess as to how many combinations there are in a 12-character string? If you guessed 479,001,600 ... congratulations!

As always, please use the expandable feedback form beneath the calculator to let me know if you discover any issues and/or have any suggestions for improvements.

Thank you!

-Dan

P.S. The new calculator was also added to the mobile version if you are accessing from a small-screen device.

Continue reading "New! All-Possible-Combinations Calculator"

Aug 22, 2016

New! Downloadable PDF Calculator!

Weekly Time Sheet PDF Calculator

Over the years I've received countless requests for downloadable versions of certain calculators, but the time and expense involved in creating stand-alone software for both Windows and Mac is cost prohibitive for a mom and pop site like mine.

Of course, I knew I could create downloadable Excel spreadsheets to accommodate those requests, but that would require the users to purchase Excel (a complicated and expensive spreadsheet software program) just to use a single calculator. So I've always kept my eyes open for an affordable solution that wouldn't require the user to purchase any complicated software.

About a month ago I stumbled across an article explaining how it's possible to make PDF forms interactive. The cool thing about an interactive PDF form is that the only requirement is Adobe Reader, which is not only free, but many already it have installed on their computer.

After several of weeks of tackling the learning curve, I was able to create the first downloadable PDF calculator. It's called the Weekly Time Sheet PDF Calculator.

As will likely be the case with all PDF calculators, I am offering 2 versions:

  1. Free Demo: Version with limited features, offered primarily so you can make sure the Premium calculator will work on your computer/laptop. Click here to get your "Free Demo" unique download link.
  2. Paid Premium: If the Demo works on your system and you wish to take advantage of its extra features, I invite you to purchase the Premium version for only $2.99 (introductory price). This version comes with a 30-day money back guarantee, plus free upgrades for 1-year.

If all goes well with this first PDF calculator, I hope to create PDF versions of all of the calculators that I've received download requests for.

Thank you!

-Dan

Jul 08, 2016

Update: New Feature Added To Annual Salary To Hourly Pay Calculator!

Annual Salary to Hourly Pay Calculator

On A Salary, But Working More Than 40 Hours Per Week?

If so, then you'll appreciate the new feature I've added to the Hourly Pay Calculator.

If you are getting paid on a salary basis but you are consistently working more than 40 hours per week, you can now plug in the number of unpaid overtime hours you work per week.

The new feature will then search for an hourly wage that closely matches what an hourly employee would be earning when time-and-a-half for overtime is factored in.

This is useful for comparing a salaried-based job opportunity with an hourly-plus-overtime opportunity.

As always, please use the feedback form beneath the calculator to let me know if you discover any issues and/or have any suggestions for improvements.

Thank you!

-Dan

P.S. The update was also added to the mobile version if you are accessing from a small-screen device.

Continue reading "Update: New Feature Added To Annual Salary To Hourly Pay Calculator!"

May 26, 2016

Drive Time Calculator Now Available In App Stores

Drive Time Calculator available in app stores.

The Drive Time Calculator is the 4th calculator to be published to the app stores.

The major upgrade of the Drive Time/ETA Calculator and subsequent creation of the app all began on March 13, 2016. That was the day I received the following feedback:

"Please PLEASE make this in to an App"

And rest, as they say, is history.

Here is what others are saying about the app:

"This is one of the best if not the best trip calculator I have ever used....Thank you!"

"Great app, you couldn't ask for anything more."

"I like the comparison drive times, they are helpful and definitely sets this calculator apart from the rest, great job!"

"Awesome app.....not sure how to rate based on options....whichever is the highest rating that is what I rate."

You can now take this popular trip calculator with you wherever you go.

You can purchase and download this ad-free app (only $2.99) using any of the following methods:

QR Code for Drive Time Calculator App
  • Open a QR Code Reader on your device and point it at the QR Code at right.
  • Visit the Drive Time Calculator page and scroll down to beneath the calculator to click the app store badge applicable to your device.
  • Go to iTunes and search for "drive-time-calculator" or go to Google Play and search for the "drivetimecalc1" app.

As always, let me know what you think of the new app.

-Dan

P.S. I am in the process of creating app versions of all of the most popular calculators on the site -- in the order of their popularity (you can now see the current list here). If you have one you would like me to prioritize, please let me know.

Apr 27, 2016

Drive Time Calculator Gets Major Upgrade!

Drive Time Calculator

Since first creating the Drive Time Calculator (back in 2012) I've received numerous requests for all sorts of features.

For those who've submitted those requests, I have great news!

This past month, in preparation for the new downloadable app version we're creating for the app stores, I took the time to add every feature that's ever been requested!

Drum roll please ...

The list of new features include:

  • Imperial (miles, gallons, MPG) or Metric (kilometers, liters, KPL).
  • Standard or military time.
  • Optional: Distance Calculator
    • Get distances between two addresses.
    • View a zoomable Google Map of the route, with draggable location markers.
    • View/print Google Map's turn-by-turn directions.
    • Addresses are saved to your web browser so you won't have to re-type them later.
  • Optional: Customizable stop times.
  • Optional: Time zone adjustment to arrival times.
  • Optional: Trip fuel-cost calculation.
  • Optional: Printer friendly trip report.

And not too worry, if you liked the old version just as it was, the calculator still has just the original 3 required fields (distance, average speed, and departure time).

Please give the upgrade a try and let me know what you think using the feedback form located beneath the calculator.

Thank you!

-Dan

P.S. The upgrade was also added to the mobile version if you are accessing from a small-screen device.

P.P.S. Ad-Free, App Version coming soon to iTunes and Google Play!

Continue reading "Drive Time Calculator Gets Major Upgrade!"

Mar 15, 2016

Age Calculator Now Available As A Free, Downloadable App

Age Calculator available in app stores.

The Age Calculator is the third calculator to be published to the app stores.

You can now take this popular calculator with you wherever you go.

Impress your friends with how quickly you can tell them how long before their next birthday, and what day of the week it will fall on -- all with or without data access!

You can download this free app using any of the following methods:

QR Code for Age Calculator App
  • Open a QR Code Reader on your device and point it at the QR Code at right.
  • Visit the Age Calculator page and scroll down to beneath the calculator to click the app store badge applicable to your device.
  • Go to iTunes or Google Play and search for the "AgeCalc" app.

As always, let me know what you think of the new app.

-Dan

P.S. I am in the process of creating app versions of all of the most popular calculators on the site -- in the order of their popularity (you can now see the current list here). If you have one you would like me to prioritize, please let me know.

Mar 10, 2016

Update: New Feature Added to Loan Amortization Calculator!

Free Loan Amortization Calculator

I have now updated the missing loan term with amortization calculator to include an often requested feature.

Payment Due Date Column

The calculator now has a feature that allows you to include the payment due dates within the printer friendly loan amortization schedule.

As always, please use the feedback form beneath the calculator to let me know if you discover any issues and/or have any suggestions for improvements.

Thank you!

-Dan

P.S. The update was also added to the mobile version if you are accessing from a small-screen device.

Continue reading "Update: New Feature Added to Loan Amortization Calculator!"

Feb 26, 2016

I Should Have Done This Years Ago!

Ever since launching this website in 2010 I've only had a single form on the site where you could go to offer your feedback.

Sure, it gave you a way send me your feedback, but having a single form created two major obstacles:

  1. You had to leave the calculator page to submit your feedback -- which left you with nothing to refer back to.
  2. You had to figure out how to send me the web address of a calculator you were no longer looking at. Otherwise I wouldn't know which calculator you were referring to.

About a week ago I finally came up with a way to add a unique feedback form to all 236 calculators -- without having to create 236 feedback forms!

At the bottom of each calculator you will now see a button to expand the new feedback form, which looks like this:

Image showing new feedback form

The benefits of this new form are:

  • You can give the calculator a letter grade (A-F).
  • You can easily refer to your entries and results, plus you can even copy from the calculator and paste into the feedback field.
  • The web address of the calculator is automatically included when I receive your feedback, so I will know exactly which calculator you are referring to.
  • The form doesn't require any personal information (name, email, etc.), so you are free to rant, rave, call me vulgar names (I can take it), or whatever, all without me knowing who you are.

Thanks to the above benefits, I've already received more awesome ideas and suggestions in the past week than I've received in the past year!

If only I had done this years ago!

Thank you in advance for your valuable feedback.

-Dan

P.S. This website gets as many as 17,000 users per day, so please forgive me if I'm unable to respond to your feedback directly. Just know that I do read ALL feedback, and that I typically add features based on the most popular requests and suggestions.

Feb 11, 2016

Triangle Calculator Now Available As Downloadable App

Triangle Calculator available in app stores.

The Triangle Calculator is now the second calculator to be published to the app stores.

You can now take this amazing calculator with you wherever you go.

Use it in the classroom, or on-the-go for architecture, mechanical engineering, pipe fitting, carpentry, plumbing and civil engineering.

The calculator shows its work so can learn from the calculator while you're using it to solve for over 20 different triangle parameters.

Get the Triangle Calculator as an App for Your Phone!QR Code for Triangle Calculator App
iTunes store iconGoogle Play store icon
Ad-free app. Includes bonus note, share, and feedback features. Only $1.99.

As always, let me know what you think of the new app.

-Dan

P.S. I am in the process of creating app versions of all of the most popular calculators on the site -- in the order of their popularity. If you have one you would like me to prioritize, please let me know.

Jan 21, 2016

First Calculator App Published to iTunes and Google Play!

Calculators available in app stores.

For those of you who've asked for downloadable calculator apps for your mobile devices, I have some great news!

I recently partnered with an app developer to help me convert my online calculators into downloadable apps for Android, iPhone, and iPad devices!

And I am thrilled to announce that we just published the first of many calculator apps to the app stores.

We started with the most popular calculator, the Conception Date Calculator, and will continue publishing calculator apps based on requests and calculator popularity.

Get the Conception Date Calculator as an App for Your Phone!QR Code for Conception Date Calculator App
iTunes store iconGoogle Play store icon
Ad-free app. Includes bonus note, share, and map features. Only $0.99. 

I hope you like it!

-Dan

P.S. I only wish the most popular calculators were those that teach users to achieve the financial freedom to discover and pursue a work they love and believe in. But judging by the most popular calculator, apparently the majority are already debt-free and loving their work! ;-)

Jan 15, 2016

Update: Two New Features Added to Paycheck Calculator!

Free Online Paycheck Calculator

I have now updated this popular calculator to include two often requested features.

Printer Friendly Report

The calculator now has a Printer Friendly Report button. Clicking the button will open a dated report showing your entries and results.

Printing the report and comparing the estimated net pay with the actual net pay will help you to adjust future entries so the estimate will be closer to the actual.

Claimed Tips

The calculator now has a row for calculating and entering claimed tips. You can either:

  • Enter the total tips claimed for the pay period.

  • Or, enter your total sales for the period and select the percentage you wish to claim. In this case the claimed tips will be calculated and entered for you.

If you earn tipped wages I think you're going to love how you can now use the calculator to see how changes in percentage of sales will effect your net pay.

As always, please let me know if you discover any issues and/or have any suggestions for improvements.

Thank you!

-Dan

P.S. The updates were also added to the mobile version if you are accessing from a small-screen device.

Continue reading "Update: Two New Features Added to Paycheck Calculator!"

Jan 10, 2016

Custom Keypads Added to Mobile Version

Mobile calculator custom keypad

I recently received several complaints from mobile users stating they could not enter a decimal point into the numeric entry fields.

Well, after researching the issue, it turns out that some makes of Android phones don't include a decimal point in their numeric keypad. What?!

I'm sorry, but I can't even begin to imagine why a phone maker would leave a decimal point out of their numeric keypad. All I can say is, thank goodness the responsible decision-maker doesn't work in a nuclear weapons factory. ;-)

In any case, since this is not the fault of the Android phone owners, I decided to take the time to create and install a custom keypad to all numeric fields in all 236 mobile calculators.

The project took a full two weeks to complete, so I hope everyone now has the ability to enter a decimal point into a numeric field (tap the grid icon next to the field if your phone's keypad doesn't include a decimal point).

Please let me know if you discover any issues with the new keypads, or if failed to include a decimal point in a field that you feel should have one.

Thank you!

-Dan

P.S. If you visit a mobile calculator that you've visited in the past, I suggest you refresh/reload the page to make sure you are using the updated version instead of an older version that may be stored in your web browser software.

Jan 01, 2016

New! Semi-Monthly Timesheet Calculator with Weighted Average OT Method

WOT Semi-Monthly Timesheet Calculator

This new calculator is the result of receiving a request asking for a semi-monthly calculator that would accommodate multiple hourly rates, and use the weighted average method to calculate overtime.

Specifically, this calculator will allow you associate any one of up to five different hourly rates to any of the completed In/Out time blocks.

The calculator then will total up the time for each hourly rate, and then use the weighted average method to calculate overtime and gross wages.

As always, please let me know if you discover any issues and/or have any suggestions for improvements.

Happy New Year!

-Dan

P.S. This new calculator also has a mobile version if you are accessing from a small-screen device.

Continue reading "New! Semi-Monthly Timesheet Calculator with Weighted Average OT Method"

Dec 13, 2015

Save Your "Aha!" Moments In Between Visits!

AhaCalcs Closed Treasure Chest

In case you've been wondering why announcements have been thin on this page of late, it's because I've spent most of the past 6 months creating a third version of the website (in addition to the full site and mobile site).

I created this alternate version of the website mainly for all of those who have requested the ability to save their entries in between visits.

As you may have discovered, many of the calculators on this website are, shall we say, entry intensive. So if you use one of the entry-intensive calculators on a regular basis, or have avoided using them due to the thought of having to re-enter all of your data each time you return, you may be interested in checking out the new Ad-Free version.

AhaCalcs.com Logo

The entry saving feature is just one of the six bonus features you'll get if you support the Ad-Free version of this website.

I've been slowly unveiling the new Ad-Free version, first to a group of beta testers, then in an update to the About Me page, and now to this blog page's readers and subscribers.

If this new version does not yet provide you with enough value to justify any financial support, I will continue to add features and benefits in hopes that one day it will prove to be worth your while.

Happy Holidays!

-Dan

Continue reading "Save Your "Aha!" Moments In Between Visits!"

Oct 20, 2015

New! Biweekly Extra Mortgage Payment Calculator

Biweekly Extra Mortgage Payment Calculator

This new calculator is the result of receiving numerous requests for being able to add an extra amount (over-payment) to each biweekly payment.

Specifically, this calculator will estimate how much time and interest you will save if you switch from making monthly mortgage payments, to making 1/2 of your payment -- plus an extra amount -- every two weeks.

This results in making the equivalent of 13 monthly payments per year, plus 26 principal prepayments. If your mortgage lender will allow you to go this route it can save you tens of thousands of dollars while hardly noticing the higher payment.

Here are a few of the calculator's included features:

  • Side by side comparison of payoff time-frames and interest costs.

  • Estimated payoff dates for both monthly and biweekly.

  • Printer friendly report with optional biweekly amortization schedule.

As always, please let me know if you discover any issues and/or have any suggestions for improvements.

Thank you!

-Dan

P.S. This new calculator also has a mobile version if you are accessing from a small-screen device.

Continue reading "New! Biweekly Extra Mortgage Payment Calculator"

Sep 16, 2015

Update: Multiplication Quiz

Weekly Planner Creator

Thanks to a suggestion from a frequent user of the Multiplication Quiz, I have now added a "0 - 12's" option to the list of built-in quizzes.

With "0 - 12's" selected, each time you click the "Reset for New Quiz" button, the bottom numbers should be repopulated with random numbers between 0 and 12.

Please let me know if you discover any issues with the new option.

Thank you!

-Dan

P.S. I am still busy developing a third version of the website. Watch for details in the next month or two!

Continue reading "Update: Multiplication Quiz"

Aug 20, 2015

Update: "Save" Feature Added to Weekly Planner Creator

Weekly Planner Creator

I have now added a new feature to the Weekly Planner Creator that will allow you to save your planner settings and time blocks in between visits.

Note that in order to use this feature you will need to be using the latest release of your web browser (Firefox, Safari, Chrome, Internet Explorer, etc.).

Using HTML5's built-in Local Storage method, the saved settings and time blocks are stored within your web browser software (not on my web server). This means the preservation of the saved data will depend on the stability of your device and its web browser software.

Please try out the planner and let me know if/how the "Save" feature worked for you. Also let me know if you would like to have the "Save" feature added to any other applicable calculators.

Thank you!

-Dan

P.S. If you don't see anything new here for a while it's because I am busy developing a third version of the website that I am very excited about. Watch for details in the coming months.

Continue reading "Update: "Save" Feature Added to Weekly Planner Creator"

Jul 06, 2015

Update: "Save" Feature Added to Loan Balance Calculator

Loan Balance Calculator

I have now added a new feature to the Loan Balance Calculator that will allow you to save your payment entries and adjustments between visits -- for any number of loans.

Note that in order to use this feature you will need to be using the latest release of your web browser (Firefox, Safari, Chrome, Internet Explorer, etc.).

Using HTML5's built-in Local Storage method, the saved loan terms and payment amounts are stored within your web browser software (not on my web server). This means the preservation of the saved data will depend on the stability of your device and its web browser software. In any case, be sure to keep a printed copy of the latest revisions to the amortization schedules.

Please try out the calculator and let me know if/how the "Save" feature worked for you. Also let me know if you would like to have the "Save" feature added to any other applicable calculators.

Thank you!

-Dan

Continue reading "Update: "Save" Feature Added to Loan Balance Calculator"

Jun 25, 2015

Update: Time Card/Sheet Calculators (New "Save" Beta Feature)

Biweekly Calculator with Unpaid Lunch

Over the years I've had many folks ask if there was a way to save their entries between visits. Some have asked about just saving the entries for themselves, and others have asked about saving entries for multiple employees.

Up until recently, the only option was to set up a database and log-in system for the website -- which is not something I could include without having to charge for its use (very time consuming to set up and maintain).

However, recent advancements in web browser software has now made it possible to store data on the user's device. It's not an ideal solution (data can only be accessed from the device and web browser that saved it, and it only works on newer web browser versions), but it's a solution I can provide without having to charge a fee.

I have now added a new "Save" feature to all time sheet/card calculators, and will add it to other applicable calculators (and their mobile counterparts) after I've received sufficient feedback on this first trial.

If you are using the latest release of your web browser (Firefox, Safari, Chrome, Internet Explorer, etc.), please try out the calculators and let me know if/how the data storage feature worked for you.

Thank you!

-Dan

Continue reading "Update: Time Card/Sheet Calculators (New "Save" Beta Feature)"

Jun 24, 2015

Update: Algebra Calculator

Algebra Calculator

After many months of begging and pleading with the company that serves the Algebra Calculator to the website (Mathway ®), I am thrilled to report that the calculator now works with mobile devices.

Up until this week, mobile users had no keypad from which to enter values into the calculator. This is no longer the case, as a virtual keypad is now included for mobile devices. Yay!!

Thank you for your patience!

-Dan

P.S. The update to the calculator has also made it possible to add the Algebra Calculator to the mobile web-app version of the site.

Jun 12, 2015

New! Triangle Calculator

Triangle Calculator

This new calculator will solve SSS, SAS, SSA, ASA, and AAS triangles.

In addition to finding the three missing side/angle values, the calculator also solves for, and provides formulas for, area, perimeter, semi-perimeter, radius of inscribed circle, radius of circumscribed circle, medians, and heights.

And finally, the triangle solver also shows it work and attempts to draw the solution from calculated vertex coordinates.

As always, let me know if you discover any issues with the new calculator (please include the name of the calculator and the inputs that brought the issue to light).

Thank you!

-Dan

P.S. The new calculator also has a mobile version if you are accessing from a small-screen device.

Continue reading "New! Triangle Calculator"

May 06, 2015

New! Pythagorean Theorem Calculator

Pythagorean Theorem Calculator

This new calculator will find the missing side length (Hypotenuse c, Leg a, or Leg b) of a right triangle if the other two side lengths are known.

The calculator also calculates the area of the right triangle, shows its work, and attempts to draw the shape of the triangle based on the results.

And finally, the page also includes a mini calculator that uses the Converse of the Pythagorean Theorem to see if three known side lengths equate to a right triangle.

As always, please let me know if you discover any issues with the new calculator.

Thank you!

-Dan

P.S. The new calculator also has a mobile version if you are accessing from a small-screen device.

Continue reading "New! Pythagorean Theorem Calculator"

Apr 20, 2015

New! Loan Affordability Calculator

Loan Affordability Calculator

This new calculator is the result of an email I received from a car dealership who still does their own private financing.

Turns out he no longer had access to the software (old DOS version of MYM) he had been using to tailor loans to his customers' ability to pay.

Oddly enough, its the same software I still use on my old Mac iBook, so I was able to pattern the new calculator after the "Loan Analysis" feature in the MYM software.

Here are a few of the many solutions this calculator can provide:

  • Size of loan based on the payment you can afford.

  • Step or graduated payments and "baby" balloons (for private lenders).

  • Variable rate loan balances.

  • Early loan payoff savings.

And finally, the calculator also includes a printer friendly amortization schedule.

Thank you!

-Dan

P.S. The new calculator also has a mobile version if you are accessing from a small-screen device.

Continue reading "New! Loan Affordability Calculator"

Apr 12, 2015

Loan Affordability Calculator with Up To 8 Midterm Modifications

Calculate how much you can afford to borrow based on your ability to make regular payments, plus recalculate up to 8 midterm payment/rate changes.

Continue reading "Loan Affordability Calculator with Up To 8 Midterm Modifications"

Apr 06, 2015

New! Online Hangman Game

Image Announcing New Online Hangman Game

While most people I know bring along a book to read while on vacation, I bring my laptop so I can "work" (toy around) on new web apps.

The first draft of this new web app was created during the 4-hour flight home last week. However, it took another week to add the features I wanted it to have, and to create the companion mobile web app. I would have been done sooner but I kept get getting caught up in playing the game (I was reminded of how much fun we had playing the game as kids).

This new online hangman game includes options for 1 or 2 player games, keeps a running score, and provides three separate methods for determining the words for the game.

  1. Add your own list of hangman words (fun way to learn the spelling of your vocabulary words).

  2. Have the game randomly select words from its built-in list of over 750 words.

  3. If playing a 2 player game you and your opponent can take turns adding and hiding words (or short phrases) for each other.

Please let me know if you discover any issues or have any suggestions for improving the game.

Thank you!

-Dan

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