Percentage Calculator
Calculate percentages, ratios and percentage changes instantly.
Calculator toolsAge Calculator
Calculate exact age in years, months and days for any date.
Processed locally in your browser — your data is not uploaded.Loading your tool…
How to use Age Calculator
- Choose a date of birth.
- Keep today or select another calculation date.
- Review calendar age and elapsed-time totals.
How are leap years handled?
The calculation uses real calendar dates, including February 29 in leap years.
No sign-up is required. The calculation or transformation happens in this browser tab and the result is available immediately.
Good to know
Why are total weeks approximate?+
A partial week is shown as a decimal.
Can I calculate age on a past date?+
Yes, when that date is on or after the date of birth.
Are results financial advice?+
No. Calculator results are estimates for comparison and planning. Check important decisions with a qualified professional.