Calculate exact age from date of birth to today or any selected date.
Enter your values, review the result, and read the formula used so the calculation is easy to understand. On Age Calculator, read this point in the context of time and date planning, because the same advice can mean something different when the inputs, units and final decision change.
Use the fields below to calculate your result instantly.
This calculator counts calendar difference. Official age rules may use local cutoff dates or document-specific rules. Keep the input values with the result so you can review the assumption later.
The Age Calculator finds the exact age between a date of birth and a chosen date. Instead of just subtracting years, it shows completed years, months, and days, which makes it far more usefull.
This is matters because months have a different lengths and leap years add extra days in it. This calculator adjusts for these variations and giving a result that is easy to read and avoids common mistakes.
Formula: Age = selected date - date of birth
The difference is then broken down into completed years, months, and days.
This ensures the output reflects completed years, months and days not just a rough decimal age.
The Age Calculator is useful as mention below points:
This calculator shows the calendar difference. Official rules may vary depending on local laws, cutoff dates or document-specific requirements. Always double-check with the relevant authority if precision is critical.
Someone born on 10 May 2000 has a different age on 9 May 2026 (25 years, 11 months, 29 days) compared to 10 May 2026 (26 years only).
Do not ignore the day and month. Age in completed years changes only after the birthday has passed.
That ignores whether the birthday has happened yet in the selected year.
Yes. Use the selected date field if the page provides one.
Leap years can affect day counts, so calendar-based calculation is more accurate.