How it works
Age is determined by complete years, calendar months and remaining days between two dates.
The results update in your browser as you change the inputs. You can test alternatives without creating an account.
FREE INTERACTIVE CALCULATOR
Age Calculator
Calculate exact calendar age and days until the next birthday without counting months as 30 days.
YOUR INPUTSLIVE RESULTS
CALCULATED RESULT26 years, 9 months, 22 days
9,792 complete days elapsed · 1,398 weeks · 321 complete months · Next birthday 2027-01-01 (70 days away).
Worked example
Someone born January 1, 2000 is 26 years old on January 1, 2026.
The default values in the tool are illustrative. Change them to match your situation.
Assumptions and limitations
Leap days and calendar month lengths are considered. A future birth date is invalid.
Results are educational estimates, not professional financial advice or a lender quote.
Frequently asked questions
How does this age calculator work?
Age is determined by complete years, calendar months and remaining days between two dates.
What is an example?
Someone born January 1, 2000 is 26 years old on January 1, 2026.
What assumptions or limitations apply?
Leap days and calendar month lengths are considered. A future birth date is invalid.
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Content created October 23, 2026. Methods and editorial standards.