# Age Calculator

URL: https://tools.otaku-dojo.com/en/age-calculator
Updated: 2026-10-03

The Age Calculator works out an exact age in years, months and days from a date of birth, plus total days, weeks and months lived and the date, weekday and countdown to the next birthday. You can also choose an "as of" date to find someone's age on a specific day, such as an eligibility cutoff.

## How to use the Age Calculator

1. Select the date of birth.
2. "Age as of" defaults to today; choose another date to calculate the age on that day.
3. Exact age, total days and days until the next birthday appear instantly.

## Specs & key facts

- **Results**: Age in years / months / days, total days, weeks, months, hours
- **Birthday info**: Next birthday date, weekday and countdown
- **Born on Feb 29**: Birthday counted as Feb 28 in non-leap years
- **As-of date**: Today by default, or any date
- **Processing**: In your browser (your birthday is never uploaded)
- **Price**: Free, no sign-up

## Examples: Exact age

```text
Born 1995-08-15 | as of 2026-10-03
```

→

```text
31 years, 1 month, 18 days
Total days: 11,372
```

## FAQ

### How is age calculated?

You turn one year older on each birthday. The remaining months and days are counted from your last birthday to the as-of date.

### When does someone born on February 29 have a birthday?

In non-leap years this tool uses February 28.

### Can I calculate age on a past or future date?

Yes. Set "Age as of" to any date after the date of birth.