Age Calculator

Calculate your exact age, or the time between any two dates, broken down into years, months, weeks, and days. Enter a birth date (or any start date) and an end date to get an instant breakdown.

Birth Date (or start date)

To Date

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Why use Age Calculator?

This calculator finds the exact duration between two dates. Enter a start date (such as a birth date) and an end date (defaulting to today), and it returns both a calendar-accurate years/months/days breakdown and simple total-day and total-week counts.

Key benefits

Calculates age or any date difference, not just birthdates
Shows years, months, days, total days, and total weeks
Handles leap years and varying month lengths correctly
No signup required

Features

Exact year/month/day breakdown between two dates
Total elapsed days and weeks
Works for future or past date ranges

Popular use cases

Finding your exact age for a form or application
Calculating how many days until or since an event
Working out the length of an employment period or project

How to use Age Calculator

1
Enter the start date
Enter your birth date, or any date you want to calculate from.
2
Enter the end date
Defaults to today, but you can change it to any other date.
3
Read the breakdown
See the age or date difference in years, months, days, total days, and total weeks.

Frequently asked questions

Does this account for leap years?

Yes, the calculation uses actual calendar dates, so leap years are handled automatically.

Can I calculate the difference between two future dates?

Yes, both dates can be any date — past, present, or future.

Why do total days and the years/months/days breakdown look different?

They are two ways of expressing the same duration — total days is a straight day count, while the breakdown converts that into calendar years, months, and remaining days.

Last reviewed: July 2026

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