Chronological Age Calculator: Exact Age & Decimal Years

Calculate your exact chronological age in years, months, and days. view your age in decimal years (e.g., 25.5 years) and total days.

Chronological Age Calculator

Date of Birth

Time (Optional)

As Of Date

Exact Chronological Age

-- total days

Decimal Age

-- years

Chronological Age: The amount of time that has passed from your birth to the given date. It is your age calculated in years, months, and days.

Decimal Age: Your age expressed as a single number (e.g. 25.5), often used in research or charts.

$$ \text{Decimal Age} = \frac{\text{Total Days}}{365.2425} $$