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.

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###### Dec 01, 2020

### New! Prefix (Polish Notation) Evaluator

This 270th new calculator, the Prefix Evaluator in the *Math* section, will evaluate a prefix expression (Polish Notation).

Plus, included in the results will be the step-by-step process for achieving the result using the stack method.

Here is a screen shot showing a partial example of how the evaluator shows the color-coded steps of the evaluation:

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 Ad-Free Member Version.

###### Dec 01, 2020

### New! Infix to Prefix Converter

This 269th new calculator, the Infix to Prefix Converter in the *Conversion* section, will convert infix math notation into prefix notation (Polish Notation, or PN) using the stack method.

You can either enter your own infix expression or choose from 22 built-in example infix expressions.

Plus, in addition to converting infix to prefix, the converter will display the step-by-step process used to arrive at the conversion.

Here is a screen shot showing an example of how the calculator displays an interactive explanation of the conversion using the stack method:

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 Ad-Free Member Version.

###### Nov 04, 2020

### New! Endpoint Calculator

This 268th new calculator, the Endpoint Calculator in the *Math Calculators* section, will find a missing endpoint given the midpoint and the other endpoint.

Plus, the calculator shows the step-by-step solution and draws the results on a Cartesian plane.

Here is an example of how the Endpoint Calculator shows its work when given a starting endpoint of (-1, 4) and a midpoint of (1, 5):

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 Ad-Free Member Version.

###### Oct 30, 2020

### New! Midpoint Calculator

This 267th new calculator, the Midpoint Calculator in the *Math Calculators* section, will find a line segment's midpoint given the two endpoints.

Plus, the calculator also calculates the line's length, shows the step-by-step solution, and draws the results on a Cartesian plane.

Here is an example of how the Midpoint Calculator shows its work:

Thank you!

-Dan

###### Oct 09, 2020

### New! Ohms Volts Watts Amps Converter

This 266th new calculator, the Ohms Volts Watts Amps Converter in the *Conversion Calculators* section, will calculate any two of the four electrical values from the two entered.

Plus, each calculated result includes the Ohms Law formulas used, along with the step-by-step solution of the two equations.

So instead of needing to find and refer to an *Ohms Law Formula Wheel* for the appropriate formula, the converter makes the selections based on the two values you enter, and then solves the formulas -- all in the blink of an eye!

In case you're not familiar with it, here is the Ohms Law Pie Chart the *Ohms Volts Watts Amps Converter* is based on:

Thank you!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### Sep 03, 2020

### New! Price Per Square Foot Calculator

This 265th new calculator, the Price Per Square Foot Calculator in the *Personal Finance* section, will calculate the rent or price per square foot.

If you already know the rent or price per square foot, you can also use the calculator to calculate the price or rental payment from the per square foot value.

Plus, the calculator includes a built-in square footage calculator wherein you can calculate and total the square footage of any number of rooms, floors, and buildings. And you can enter width and length measurements in feet only, feet and inches, or inches only.

Here is a screen shot showing a how the built-in, expandible square footage calculator converts the width and length measurements to square feet and totals all square footages:

And finally, you can save or print your square footage entries for later use.

Thank you!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### Aug 18, 2020

### New! Rule of 72 Calculator

This 264th new calculator, the Rule of 72 Calculator in the *Investing* section, will calculate the time or interest rate required for an investment to double.

In addition to the Rule of 72, the calculator also includes alternative double-your-money rules (69 and 70), as well as the Rule of 115 (triple your money) and the Rule of 144 (quadruple your money).

Plus, if you enter the starting amount of the investment, an annual growth chart will be included in the results.

Here is a screen shot showing a portion of the results when *Rule of 72* and *Number of Years* are selected:

Thank you!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### Jul 25, 2020

### New! Yahtzee Online Game

This 263rd new calculator, the Yahtzee Online Game in the *Sports, Games, and Fun* section, includes options for calculating a scoresheet, playing solitaire, or playing multiplayer with up to six players.

A built-in score calculator displays the points for all unfilled combinations after each dice roll, and you can click the blue combination titles for popup scoring descriptions.

Here is a screen shot showing an example of the game report you can print out when playing solitaire Yahtzee:

It only takes about 4 minutes to play a game of solitaire Yahtzee, so I invite you to give it try and and 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 Ad-Free Member Version.

###### Jun 25, 2020

### New! Dice Roll Simulator

This 262nd new calculator, the Dice Roll Simulator in the *Sports, Games, and Fun* section, will generate a random dice roll for 1-20 dice having 2-20 sides.

A built-in roll calculator will calculate the sum, average, and product of each roll, plus keep cumulative totals for a series of rolls.

Also, the shake timing can be set to random stop time or to manual stop time, and the roll-display can be set to include a history of prior rolls.

Here is a screen shot showing an example of how the virtual dice roller displays the rolls when five, six-sided dice are being rolled:

Thank you!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### Jun 10, 2020

### New! Speed Distance Time Calculator

This 261st new calculator, the Speed Distance Time Calculator in the *Conversion* section, will calculate the speed, distance, or time when given the two known variables.

In other words, the calculator will solve for *speed* given the time and distance, *distance* given the speed and time, and *time* given the speed and distance.

Also, speed and distance units can be entered or solved for in inches, feet, yards, miles, nautical miles, centimeters, meters, and kilometers, and rate can be entered or solved for in per second, per minute, or per hour ratios.

Plus, the results will include a step-by-step explanation detailing how the calculator solved for the missing variable -- including any unit conversions it performed.

Here is a screen shot showing an example of how the calculator explains its work:

Thank you!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### Mar 14, 2020

### Update: Budgeting Percentages Average Calculator

Just a quick note to you let you know that I have updated the Budgeting Percentages Average Calculator in the *Budget* section to reflect the latest *Consumer Expenditure Survey* conducted by the U.S. Bureau of Labor Statics.

Just enter your before-tax income and the calculator will tell you what others in your income level spend on 14 different household expense categories, plus 83 sub-categories.

Here is a screen shot showing a partial example of how your income is split up between expense categories and sub-categories based on the survey results:

Plus, I also added a 50/30/20 Budget Calculator to the *Notes* section on the page.

Thank you!

-Dan

P.S. The updates were also added to the Ad-Free Member Version of the calculator.

###### Mar 12, 2020

### New! Postfix (Reverse Polish Notation) Evaluator

This 260th new calculator, the Postfix Evaluator in the *Math* section, will evaluate a postfix expression (Reverse Polish Notation).

Plus, included in the results will be the step-by-step process for achieving the result using the stack method.

Here is a screen shot showing a partial example of how the evaluator shows the color-coded steps of the evaluation:

Thank you!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### Mar 01, 2020

### Golf Handicap Calculator Updated to World Handicap System

As of January 1, 2020, instead of having six different golf handicap systems across the globe, the six systems have now been combined into a single *World Handicap System (WHS)*.

This means that your established handicap index can now be applied to any golf course in the world.

Of course, this new handicap system meant a major overhaul was needed to bring the Golf Handicap Calculator up to speed, which I'm happy to report has now been completed.

And in addition to the changes to the handicap index calculation, changes were also made to the course handicap calculation. These changes have now been incorporated into the Course Handicap Calculator that is included in the **Learn** section.

Thank you!

-Dan

P.S. The update was also added to the Ad-Free Member Version of the calculator.

###### Feb 19, 2020

### New! Ordering Fractions Calculator

This 259th new calculator, the Ordering Fractions Calculator in the *Math* section, will arrange a list of fractions and mixed numbers in either ascending or descending order.

Plus, included in the results will be the step-by-step process for sorting the fractions, which includes converting the fractions to decimals, and converting the fractions to like denominators.

Here is a screen shot showing a partial example of how the calculator converts the fractions to decimals and like denominators for easier sorting:

Thank you!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### Feb 12, 2020

### IRA Calculators Updated for SECURE Act

In case you weren't aware, once you reach a certain age you must begin making withdrawals from your Traditional IRA. These withdrawals are referred to as, *Required Minimum Distributions*, or *RMDs*. And if you fail to make an RMD you could face a possible 50% tax penalty on the shortage.

So at what age must you begin making the required minimum withdrawals? Well, up until recently, you were required to begin making RMDs once you reach age 70-1/2 (or age 71 if you turned age 70-1/2 in the last half of the year).

However, with the recent passage of the *Setting Every Community Up for Retirement Enhancement (SECURE) Act*, if you will reach age 70-1/2 after January 1, 2020 (born after June 30, 1949), you won't need to begin making RMDs until the year you turn age 72.

And of course, the passage of the SECURE Act also meant that I needed to update the following IRA calculators to reflect the change, which I have just completed.

- IRA Growth and Distribution Calculator for Traditional IRA owners younger than the minimum withdrawal age (70-1/2 or 72).
- Current RMD Due Calculator for Traditional IRA owners at or older than the minimum withdrawal age (70-1/2 or 72).
- Future IRA Growth and Distribution Calculator for Traditional IRA owners at or older than the minimum withdrawal age (70-1/2 or 72).

As always, please use the expandable feedback form beneath the calculators to 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 Ad-Free Member Version of the calculator.

###### Feb 03, 2020

### New! Infix to Postfix Converter

This 258th new calculator, the Infix to Postfix Converter in the *Conversion* section, will convert infix math notation into postfix notation (reverse polish notation, or RPN) using the stack method.

You can either enter your own infix expression or choose from 20 built-in example infix expressions.

Plus, in addition to converting infix to postfix, the converter will display the step-by-step process used to arrive at the conversion.

Here is a screen shot showing a partial example of how the calculator displays the token-by-token conversion using the stack method:

Thank you!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### Jan 15, 2020

### Update: Paycheck Calculator

Just a quick note to you let you know that I have updated the Paycheck Calculator to reflect the changes introduced to the Form W-4 for 2020 and later.

I also updated the federal withholding rates (2020), as well as the latest state withholding rates (2019).

Plus, if you are an employer, the calculator has a built-in federal withholding tax calculator based on *Worksheet 1 in Publication 15-T*, allowing you to double-check your withholding calculations.

Thank you!

-Dan

P.S. The updates were also added to the Ad-Free Member Version of the calculator.

###### Jan 07, 2020

### New! PEMDAS Calculator

This 257th new calculator, the PEMDAS Calculator in the *Math* section, will solve math problems using the PEMDAS order of operation convention.

Specifically, the calculator will solve expressions in this order:

- Parentheses
- Exponents
- Multiplication and Division
- Addition and Subtraction

You can either enter your own problem or choose from 20 built-in example problems.

Plus, in addition to solving the order of operation problem, the calculator will display the ordered, step-by-step process used to arrive at the solution.

Here is a screen shot showing a partial example of how the calculator displays the step-by-step, colored-coded solution:

Wishing you a happy and healthy 2020!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### Dec 05, 2019

### New! Money Counter Calculator

This 256th new calculator, the Money Counter Calculator in the *Business* section, will come in handy if you need to count the value of a mix of US bills and coins.

Here is a screen shot showing a portion of an example count of bills and coins:

Plus, the calculator can also list the change to give back to a customer when the cash tendered is greater than the amount due, and even includes the verbal script for teaching employees how to verbally count the change back to the customer.

Here is a screen shot showing how the calculator can be used to calculate change back:

Happy Holidays!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### Nov 20, 2019

### New! Late Payment Interest Calculator

This 255th new calculator, the Late Payment Interest Calculator in the *Business* section, will calculate the late fee on an overdue invoice.

Specifically, the calculator will calculate the number of past due days, the daily penalty rate, the total penalty interest, and the total amount due at settlement.

Here is a screen shot showing a portion of an example calculation:

Wishing you a very happy Thanksgiving!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### Nov 16, 2019

### New! Biweekly Loan Balance Calculator

This 254th new calculator, the Biweekly Loan Balance Calculator, is a bi-weekly version of the Monthly Loan Balance Calculator.

Just like the monthly version, this version creates an editable amortization schedule wherein you can change the default payment amounts to match the payment history, and with each change, the period and endings balances are recalculated.

Here is a screen shot showing a portion of an example calculation:

Wishing you a very happy Thanksgiving!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### Nov 04, 2019

### Update: School Calendar Calculator

Recently a homeschool parent wrote to me asking if I could add the *Class Day Number* to the School Calendar Calculator. According to her, this would help her to match the curriculum planner with the current date.

So, for her and other homeschooling parents, I'm happy to report that I have now added the *Class Day Number* to the printable calendar.

I also added a feature that gives you the option to have the calculator mark federal holidays as no-school days. Of course, you can edit the no-school days to exactly match your school's class schedule.

Here's a screenshot showing the new features in the printable calendar (the top gray number is the number of school days left in the school year, and the bottom gray number is the *Class Day Number*).

Thank you!

-Dan

P.S. The updates were also added to the Ad-Free Member Version of the calculator.

###### Aug 27, 2019

### New! Ratio Calculator

This 253rd new calculator, the Ratio Calculator, will ...

- Simplify ratios and show steps.
- Compare two ratios and show steps.
- Solve for the missing term in A:B = C:D problems and show steps.
- Generate a list of 100 ratios equal to the results.
- Display a pie chart showing the percentage each side of the ratio represents.

Here is a screen shot showing a portion of an example of the results:

Plus, the **Learn** section of the page includes the following bonus material:

- What is a ratio?
- How to simply a ratio.
- How to determine if two ratios are equal.
- How to solve ratio equality problems.
- How to scale a ratio up or down.

Best wishes for the new school year!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### Jun 15, 2019

### New! Add Hours Minutes Calculator

This 252nd new calculator, the Add Hours Minutes Calculator, will ...

- Add an unlimted number of hour and minute time blocks without requiring you type any colons.
- Convert minutes to decimal numbers.
- Optionally auto-tab to next field once a customizable number of digits have been entered, and adds new entry rows as you need them.
- Report the total time in both HH:MM and HH.HH formats.
- Create a formatted report for printing.

Here is a screen shot showing how the calculator adds hours and minutes as you enter them:

Plus, the **Learn** section of the page includes the following bonus material:

- How to Add Time.
- Hours Minutes Seconds Calculator.

Happy adding!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### May 05, 2019

### New! Golf Scorecard Handicap Calculator

This 251st new calculator, the Golf Scorecard Handicap Calculator, will ...

- Mark handicap strokes on a scorecard for up to 8 players.
- Create a printable blank scorecard.
- Create a completed stroke play or Stableford scorecard with handicaps.
- Allow you to save courses and playing groups between uses.

Here is a screen shot of an example blank scorecard created by the golf scorecard calculator:

Here is a screen shot of an example completed scorecard for stroke play:

And a screen shot of an example completed scorecard for a Stableford game:

Plus, the **Learn** section of the page includes the following tutorials:

- How to Score Golf Handicap on Golf Scorecard.
- Stableford Scoring with Handicaps.

Happy golfing!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### Apr 07, 2019

### New! Golf Handicap Calculator

This 250th new calculator, the Golf Handicap Calculator, will ...

- Calculate your 18-hole or 9-hole handicap index.
- Convert your handicap index into course handicaps.
- Automatically sort rounds as you enter them, saving you from having to re-enter the course name, rating, and slope for every round.
- Allow you to save courses, rounds, and tees between uses.

Here is a screen shot of a portion of the interactive solution displayed by this golf handicap index calculator:

Plus, the **Learn** section of the page includes the following tutorial and bonus calculators:

- How to Calculate Your Golf Handicap.
- Golf Differential Calculator.
- Course Handicap Calculator.

Happy golfing!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### Mar 19, 2019

### New! Trip Fuel Cost Calculator

This 249th new calculator, the Trip Fuel Cost Calculator, will ...

- Calculate a trip's gas cost based on distance (miles or kilometers), fuel economy (MPG, L/100Km, L/M, or KM/L), and the price of gas (gallon or liter).
- Calculate the gas cost per mile or per kilometer.
- Split the trip's fuel cost between travelers sharing the cost.
- Display the formula used along with its solution.

Here is a screen shot of a portion of the interactive solution displayed by this travel gas calculator:

Plus, the **Learn** section of the page includes the following tutorial and bonus calculator:

- How to Calculate Trip Fuel Cost.
- Miles to Money Calculator.

Happy first day of spring tomorrow!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### Feb 07, 2019

### Update: Mortgage Recast Calculator

Upon learning the Mortgage Recast Calculator was going to be linked from an article in the *Wall Street Journal*, I went through all of the feedback on the calculator and added the following most common requests.

- If you've made extra payments on your mortgage, the calculator can now estimate your principal balance for you in one of two ways:
- From the number of payments remaining.
- Or, from the month and year of the mortgage maturity date.

- If your mortgage lender offers annual recasting, you can now see how much you will save by making the same principal reduction every year the balance is greater than the reduction.
- The calculator now has a
**Load Sample Entries**button, allowing you to simply edit the pre-filled fields. - The printer friendly report now includes calculator entries, results, and if you opt for it, the re-amortized payment schedule.

If you are a subscriber to the *Wall Street Journal*, here is the link to the "To Reduce Payments, Recast Your Mortgage" article containing a link to the calculator.

Happy recasting!

-Dan

P.S. The updates were also added to the Ad-Free Member Version of the calculator.

###### Jan 10, 2019

### New! Long Addition Calculator That Shows Its Work

This 248th new calculator, the Long Addition Calculator, will ...

- Add multiple whole numbers and/or decimals, and show its work.
- Show you how to solve the problem without a calculator.
- Explain each step involved in solving the problem.

Here is a screen shot of a portion of the interactive solution displayed by this sum of numbers calculator, for the problem 123.2 + 456.78 + 789.101:

Plus, the **Learn** section of the page includes the following tutorial:

- How to Add Multiple Numbers Without a Calculator.

Wishing you an excellent 2019!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

###### Dec 03, 2018

### New! Adding and Subtracting Decimals Calculator

This new Add and Subtract Decimals Calculator will ...

- Add or subtract positive or negative decimals or integers, and show its work.
- Show you how to solve the problem without a calculator.
- Explain each step involved in solving the problem.

Here is a screen shot of a portion of the solution displayed by the calculator, for the problem (-987.654) - (-67.89):

Plus, the **Learn** section of the page includes the following tutorials:

- How to Add and Subtract Decimals.
- How to Add Negative Numbers.
- How to Subtract Negative Numbers.

Happy Holidays!

-Dan

P.S. The new calculator was also added to the Ad-Free Member Version.

Continue reading "New! Adding and Subtracting Decimals Calculator"

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