Age Calculator
Calculate age today, on a custom reference date, or between any two dates with shareable birthday countdown insights.
Get the result in 3 steps
Pick a mode, enter the dates, then review or export the exact age summary.
- Choose modeUse today, a reference date, or compare dates.
- Enter datesAdd birth, reference, or start/end dates.
- Review resultCheck exact age, birthday context, then export.
Choose a date calculation
Select a mode, enter the relevant dates, and calculate the exact calendar difference.
Ready to calculate
Why use this age calculator?
Use it when you need precise calendar-aware age math, date spans, birthday context, and a result that is easy to copy, download, or share.
FAQs
Can I calculate age on a future reference date?
Yes. Switch to the custom reference date mode and choose any date on or after the date of birth.
Can I compare two dates without using a birth date?
Yes. Use compare mode to measure the exact span between any two calendar dates.
Is leap year math handled?
Yes. The calculator uses calendar-aware date differences and highlights leap-year insights.
What does the share link include?
It stores the selected mode and dates in the URL so the exact result can be reopened and shared.
Can I download the age result?
Yes. After calculating, use Download Result to save a summary card for your records.
Does the calculator store my date of birth?
No. Calculations run in your browser, and your dates are only included in a share link if you choose to copy one.