How to Calculate Your Age in Years: Formula & Examples

Age calculation is a basic skill used for job applications, insurance, and official documents.

Simple Way to Calculate Age

1. Subtract your birth year from the current year
2. If your birthday hasn’t happened yet this year, subtract 1 more

Age = current year − birth year (minus 1 if birthday hasn’t passed)

Examples

Born 15 March 1990, today 13 August 2026:

• 2026 − 1990 = 36
• Birthday (March) has passed → full 36 years

But if born 15 December 1990 (birthday not yet reached):

• 2026 − 1990 = 36 → minus 1 → 35 years

Precise Calculation (by days)

Count the exact number of days since birth and divide by 365.25 (average days per year including leap years) for a decimal age.

Where Age Matters

• Job applications and interviews
• Life and health insurance
• Senior savings accounts

Try the age calculator to know your exact age instantly.