Age Calculator

Calculate your exact age or the interval between any two dates — shown in years, months, weeks, days, hours, minutes, and seconds.

How It Works

The Age Calculator measures the precise time elapsed between two dates. Select a start date and an end date — today is pre-filled as the default end date — and the result appears instantly.

The calculation is calendar-aware: it correctly handles leap years, months of different lengths, and all edge cases that come with real-world date math.

Common Uses

  • Find your exact age — know precisely how old you are, right down to the second
  • Calculate time until an event — find out how many days remain until a birthday, deadline, or anniversary
  • Measure elapsed time — determine how long ago a historical event occurred
  • Date math — quickly compute the interval between any two dates for legal, academic, or personal purposes

Understanding the Result

The top row shows your age (or interval) broken into years, months, and remaining days — the format used in most official documents.

The rows below give the full interval expressed as a single unit each: total weeks, total days, total hours, total minutes, and total seconds. These are useful for countdowns, age comparisons, or time-tracking purposes.

Frequently Asked Questions

How does the age calculator work?
Enter a start date (such as your date of birth) and an end date (today by default). The calculator computes the exact difference and displays it in multiple units simultaneously.
Can I calculate the interval between any two dates?
Yes. You can enter any two dates — past, present, or future. It is not limited to birth dates.
What units are shown in the result?
The primary result shows years, months, and remaining days. Below that you see the total interval expressed in weeks, days, hours, minutes, and seconds.
Does the calculator account for leap years?
Yes. The calculation is based on the actual calendar, so leap years and months with different numbers of days are handled correctly.
Is the calculator free?
Yes, it is completely free with no registration required.