Age Calculator
Calculate exact age in years, months, days and even hours from a date of birth.
Years —
Months —
Days —
Total hours lived —
Pick a date of birth and this tool works out the precise age as of right now — broken down into full years, additional months, additional days, and total hours lived. It's useful for forms requiring exact age, curiosity about milestones, or double-checking eligibility rules based on age.
How to use it
- Pick a date of birth using the date field.
- The exact age appears instantly in years, months and days.
- Total hours lived is also shown below.
- Change the date to recalculate at any time.
Frequently asked questions
Does this account for leap years?
Yes, the calculation is based on actual calendar dates including leap years, so the year and day counts are precise.
What time is 'now' based on?
It uses your device's current date and time at the moment you calculate.
Can I calculate age as of a different date, not today?
This version calculates age as of right now; for a past or future reference date you'd need to manually adjust, but this is a common feature we may add.