Date & time · Dates
Age Calculator
Calculate your exact age in years, months, and days from your date of birth. See total days lived and days until your next birthday. Free online age calculator.
Enter values above to see the result.
How it works
Calculates exact age from a date of birth to today (or any other reference date), showing years, months, days, total days, and time until the next birthday.
Step by step
- 1Enter your date of birth in YYYY-MM-DD format.
- 2Leave 'Age as of' blank to calculate age as of today.
- 3The tool computes the difference in years, months, and remaining days.
- 4Next birthday countdown shows how many days until your next birthday.
Examples
Born 1990-01-15, as of 2026-04-18
From January 15, 1990 to April 18, 2026 is exactly 36 years and 3 months.
Inputs
- birthdate:
- 1990-01-15
- as_of:
- 2026-04-18
Result
- age_full:
- 36 years, 3 months, 3 days
Note: Dates must be in YYYY-MM-DD format.
Frequently asked questions
How is age calculated exactly?▾
Age is calculated by counting full years since the birthdate, then full months in the remaining period, then remaining days. The 'as of' date defaults to today.
Can I calculate age for a past or future date?▾
Yes — use the 'Age as of' field to specify any reference date instead of today.