Age Calculator

Not just years. See your exact age in months and days, and find out exactly when your next birthday falls.

Need day count instead?

Use the Date Calculator

Enter your birth date to see results

Need to calculate a future date?

Use our Date Calculator to add days, weeks, or months to a specific date.

Go to Date Calculator

How We Calculate Age

Calculating age seems simple, but calendars are messy. Leap years, months with 30 vs 31 days, and February's changing length make "simple subtraction" inaccurate.

Our calculator uses the specific calendar days to ensure 100% precision. It accounts for:

  • Leap Years: Dates like Feb 29th are handled correctly.
  • Month Lengths: Automatically adjusts for 28, 30, or 31 day months.
  • Next Birthday: Tells you the exact day of the week your next party falls on.

Frequently Asked Questions

How do I calculate age in Excel?

=DATEDIF(A1, TODAY(), "y")

Replace 'A1' with the cell containing the birth date.

Can this calculate age on a specific past date?

Yes! Change the "Age at Date" field to any date in history to find out exactly how old you were on that day.