Age Calculator

The Age Calculator works out your exact age in years, months and days on any date, the total number of days you've been alive, and how many days until your next birthday.

Calculator

Date of birth

Age at date

Formula

years = target year − birth year (adjusted for month/day)
total days = (target date − birth date) ÷ 1 day

Examples

• Born 15 March 1990, age at 16 Aug 2026 → 36 years, 5 months, 1 day.
• Next birthday countdown shown in days.

How to use this calculator

Enter your date of birth and the date you want to calculate your age at (defaults to today).

Frequently asked questions

Is my date of birth stored?

No. The date stays in your browser and is never saved unless you choose to save a calculation with an account.

Why does the day count sometimes differ from other tools?

Some tools count the start or end day inclusively. This calculator counts whole days between the dates.

You may also need

Date Calculator

Add or subtract days from a date, or find the difference between two dates including business days.

Days Between Dates

Count the total days and business days between two dates.

Countdown Calculator

Live countdown to any future date and time, updating every second.

Learn more

How To Calculate Your Age

ARANGEE provides informational tools only. For financial, tax or legal decisions, verify with a qualified professional. See our disclaimer.