# Age Calculator

Work out an age in years, months and days, with totals and the next birthday.

- Category: Math (math)
- URL: https://ilham.dev/tools/age-calculator/
- Documentation: https://ilham.dev/tools/age-calculator/index.md
- Keywords: age, birthday, birth date, umur, tanggal lahir, years, months, days, calculator

## Example questions

- Why not just divide the total days by 365?
- Which date is the second field for?
- How is the next birthday counted?

## Properties

- Runs in the browser
- No login required
- No data uploaded


## About

Work out an age the way a birthday works: whole years, then whole months, then the leftover days. Alongside that it shows the totals in days, weeks, months and hours, the weekday someone was born on, and how long until the next birthday. Move the second date to see an age at any point.


## Questions

### Why not just divide the total days by 365?

Because a year is not 365 days on average and months have different lengths. Counting whole years, then months, then days is how people read an age, and it stays correct across leap years.

### Which date is the second field for?

It is the date you are measuring the age at. It defaults to today, but you can set it to a past date for a record or a future date to see how old someone will be.

### How is the next birthday counted?

The page takes the birth month and day in the current year, or the next one if that has already passed this year, and counts the days between. A birthday today shows as today.