Calculate your exact age down to years, months, days, weeks, hours, minutes, and seconds. Supports leap year policies and corrected age for premature infants.
We offer three policies for handling February 29 birthdays in non-leap years: ISO/European standard treats it as February 28, while US legal standard treats it as March 1. You can select your preferred policy in the calculator.
Corrected age (also called adjusted age) accounts for prematurity by subtracting the number of weeks a baby was born before 40 weeks gestation. This gives a more accurate developmental age for premature babies.
Our calculations are precise to the second, accounting for leap years, varying month lengths, and time zones. We use the Temporal API for accurate date/time calculations.
Yes! Use the "Calculate As Of" field to calculate age for any past or future date. This is useful for determining age on specific dates like anniversaries or legal documents.