Age Calculator

Calculate your exact age in years, months and days from any birth date.

Date of birth Age at date (default: today)

How is age calculated?

Age is calculated by finding the difference between the birth date and the reference date (default: today). The result accounts for different month lengths and leap years to give an exact result in years, months and days.

Can I calculate age at a past or future date?

Yes — change the "Age at date" field to any date. This lets you find out how old someone was on a specific historical date, or how old they will be on a future date.

Uses for an age calculator

Verifying someone's age for legal requirements
Calculating age for birthday cards and milestones
Determining eligibility (retirement, pensions, school enrollment)
Genealogy and historical research