Age Calculator
Exact age in years, months and days, plus the days, hours and minutes lived and when the next birthday falls.
Results
Years
36
Months
3
Days
29
Days between
13,270
Weeks
1895.7
Next birthday in
244
In hours
318,480
In minutes
19,108,800
And it falls on a
20 May 2027
What this tool does
Age is counted in completed years, months and days, the way official forms expect it — not as a decimal. Change the reference date to work out how old someone will be on a future date, or was on a past one.
Formula
age = whole years, months and days between the two dates
Variables
| Symbol | Meaning | Unit |
|---|---|---|
birth_date | Date of birth | — |
reference_date | Reference date | — |
years | Years | — |
months | Months | — |
days | Days | — |
total_days | Days between | — |
total_weeks | Weeks | — |
days_to_birthday | Next birthday in | — |
total_hours | In hours | — |
total_minutes | In minutes | — |
next_birthday | And it falls on a | — |
Worked example
- Date of birth1990-05-20
- Reference date2026-09-18
- Years36
- Months3
- Days29
- Days between13,270
- Weeks1895.7
- Next birthday in244
- In hours318,480
- In minutes19,108,800
- And it falls on a20 May 2027
Limitations
- Dates are handled as calendar dates. Time zones, daylight saving changes and public holidays are not taken into account.