Age Calculator: How Old Am I? Or ... How Old Was I, How Old Will I Be, or When Will I Be?

Age Calculator Sign

This free online date calculator will calculate how old you are in years, months, and days for any ending date you enter, and tell you how old you are in months, weeks, days, hours, minutes, and seconds.

Plus, the built-in birthday calculator will also tell you what day you were born on, how many days remain until your next birthday, and on what day of the week your next birthday will fall on.

And finally, the calculator can even tell you on what date you will turn a certain age (e.g., When will I be 59.5 or 59-1/2 years old?, When will I be 18?).

Note that if you would like to learn how to calculate age manually (subtract one date from another without having to use a calculator), please visit the Chronological Age Calculator that shows you how to determine the age of a person in years, months, and days as of a given test date.

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Age Calculator

Calculate your age in months, weeks, days, hours, minutes, and seconds -- for any given date, plus calculate when you will be a certain age, and how many days until your next birthday.

Special Instructions

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Selected Data Record:

A Data Record is a set of calculator entries that are stored in your web browser's Local Storage. If a Data Record is currently selected in the "Data" tab, this line will list the name you gave to that data record. If no data record is selected, or you have no entries stored for this calculator, the line will display "None".

DataData recordData recordSelected data record: None
Date of birth:

Date of birth:

Select the month and day and enter the 4-digit year of your date of birth.

Age date:

Date to calculate age for:

Select the month and day and enter the 4-digit year of the date you would like to calculate your age for.

Future age:Future age:Optional future age:Optional: When will I be this age?

Optional: When will I be this age?

If you would like to know what date you will be a certain age, enter an age that is greater than your current age. Otherwise leave blank. Note that you can enter a decimal number (59.5, for example).

#
Age:Age:Age:Age:

Age:

This is your age as of the ending date you entered.

Months old:Months old:Months old:Months old:

Months old:

This is the number of months that have passed since your date of birth.

Weeks old:Weeks old:Weeks old:Weeks old:

Weeks old:

This is the number of weeks that have passed since your date of birth.

Days old:Days old:Days old:Days old:

Days old:

This is the number of days that have passed since your date of birth.

Hours old:Hours old:Hours old:Hours old:

Hours old:

This is the number of hours that have passed since your date of birth.

Minutes old:Minutes old:Minutes old:Minutes old:

Minutes old:

This is the number of minutes that have passed since your date of birth.

Seconds old:Seconds old:Seconds old:Seconds old:

Seconds old:

This is the number of seconds that have passed since your date of birth.

Days to bday:Days till bday:Days until your next birthday:Days until your next birthday:

Days until your next birthday:

This is the number of days until your next birthday.

Age :Age :Turn age :Date you will turn :

Date you will turn the entered age:

If you entered a future age in the top section of the calculator, this row will list the approximate date you will reach the future age.

If you would like to save the current entries and results to the device you are using, tap or click on the Data tab and then tap or click on the Save button. If you upgrade your Basic, Local Storage subscription to the Cloud Storage acess level, you can save multiple sets of entries for this calculator to the secure online database, which makes them accessable from any device.

Help and Tools

Bonus

Additional age related calculators.

What Year Was I Born Calculator

Enter your current age and select your birth month and day to calculate what year you were born. The results will also include a year and age chart showing your age by year and approximately what school grade you were in for the applicable years.

Year You Were Born Calculator
Current age:
Birthday:
Year born:

Age Difference Calculator

Use the following calculator to find the age difference between to dates of birth (DOB), i.e., who's older and by how many years, months, and days.

Age Difference Calculator
DOB #1:
DOB #2:
Age Difference:
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Adjust Calculator Width:

Move the slider to left and right to adjust the calculator width. Note that the Help and Tools panel will be hidden when the calculator is too wide to fit both on the screen. Moving the slider to the left will bring the instructions and tools panel back into view.

Also note that some calculators will reformat to accommodate the screen size as you make the calculator wider or narrower. If the calculator is narrow, columns of entry rows will be converted to a vertical entry form, whereas a wider calculator will display columns of entry rows, and the entry fields will be smaller in size ... since they will not need to be "thumb friendly".

Show/Hide Popup Keypads:

Select Show or Hide to show or hide the popup keypad icons located next to numeric entry fields. These are generally only needed for mobile devices that don't have decimal points in their numeric keypads. So if you are on a desktop, you may find the calculator to be more user-friendly and less cluttered without them.

Stick/Unstick Tools:

Select Stick or Unstick to stick or unstick the help and tools panel. Selecting "Stick" will keep the panel in view while scrolling the calculator vertically. If you find that annoying, select "Unstick" to keep the panel in a stationary position.

If the tools panel becomes "Unstuck" on its own, try clicking "Unstick" and then "Stick" to re-stick the panel.