Age Calculator
Free age calculator: get your exact age in years, months and days, or the number of days between any two dates. Runs entirely in your browser.
- ✓ Runs in your browser — nothing uploaded
- ✓ No sign-up
- ✓ Free, no limits
This free age calculator tells you exactly how old someone is in years, months and days — or the precise gap between any two dates. Enter a date of birth, leave the end date set to today, and the breakdown appears instantly alongside the total number of days between the two dates.
It answers the questions a simple year-subtraction gets wrong: the calculator counts complete years, then complete months, then leftover days, the same way official forms and HR systems expect. It handles leap years and different month lengths correctly, and if you enter the dates in the wrong order it quietly swaps them instead of showing an error.
Beyond birthdays, use it for anything date-based: how long you have been at a job, days until a deadline or a wedding, the age gap between two people, or the exact duration of a project. Everything is calculated locally in your browser — no dates are uploaded anywhere, and it keeps working offline once the page has loaded.
Frequently asked questions
How is exact age calculated?
The calculator counts complete years first, then complete months, then the remaining days — accounting for leap years and month lengths. That is why the result is “35 years, 2 months, 12 days” rather than a rounded number.
Can I calculate days between two dates?
Yes. Enter any two dates and the total-days card shows the exact number of calendar days between them, ignoring the time of day.
What happens if I enter the dates in the wrong order?
Nothing breaks — the calculator automatically swaps them and shows the same positive difference.
Is my date of birth sent anywhere?
No. All calculations run locally in your browser; no dates are transmitted or stored.