Age and Date Calculators
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Calculate exact calendar age, age on another date, the gap between dates, or the countdown to a birthday without dividing days by 365.
Choose an age tool
How Old Am I CalculatorCalculate exact calendar age in years, months and days plus total days and completed weeks.Age on a Specific Date CalculatorFind completed calendar age on any past or future reference date with totals for days and weeks.Age Difference CalculatorCalculate the absolute calendar difference between two dates in years, months, days and total days.Birthday Countdown CalculatorCount exact days to the next birthday and show the age reached, with a disclosed February 29 convention.
Calendar method
Completed years and months follow calendar boundaries. Total days are shown separately so leap years and month lengths remain auditable.
Frequently asked questions
Why not divide by 365?
Years vary in length and completed age changes on a calendar anniversary.
How is February 29 handled?
The countdown states its common-year convention; legal rules can differ by jurisdiction.
Sources
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