Age Calculator

Free browser-based tool. Use the controls below to get started.

QUICK GUIDE

Calculate your age from a birth date

Choose your date of birth and the date to calculate against, then read the years, months, and days result. Example: compare 15 May 2000 with today to estimate your current age.

Enter a valid birth date

Follow the fields and controls shown in the tool above.

Use the reference date field if available

Check the selected settings and input values before continuing.

Review the years, months, and days shown

Review the output before copying, saving, or sharing it.

Processing behavior depends on the tool and browser. Do not use confidential or sensitive content unless you have confirmed how that specific tool handles it.

Read the full guide

ABOUT THIS TOOL

About the Age Calculator

The HandyTools Age Calculator works out exactly how old someone is on any date you choose. Enter a date of birth and the tool shows the age in full years, months and days, along with the total number of days and weeks and the date of the next birthday.

It is useful for forms that ask for age on a particular date, school or sports eligibility checks, planning a birthday, or simply satisfying curiosity. The calculation runs in your browser, so the dates you enter stay on your device.

Tips for best results

Change the reference date to find an age in the past or the future, for example the age someone will be on a deadline.
Months and days are counted from the calendar, so leap years and month lengths are handled for you.
Double-check the birth date format before you read the result; a swapped day and month changes the answer.

Frequently asked questions

How does the age calculator count months and days?

It counts complete years first, then the remaining complete months, then the remaining days between the birthday and the date you are calculating against.

Can I calculate age on a future or past date?

Yes. Set the reference date to any day, and the result shows the age on that day instead of today.

Is my date of birth stored anywhere?

No. The calculation happens in your browser and the date you type is not saved by this tool.