What this calculator does
If you've ever opened a spreadsheet just to answer one time & date question, this age calculator replaces the whole workbook: type the numbers, read the result.
Calculates exact age from date of birth.
How to use the Age Calculator
- Enter your values in the fields on the left.
- Results update automatically.
- Use action buttons to copy, share or print.
The formula
Difference in years, months and days between DOB and today.
Worked example
Born 2000-01-01 → ~24 years old today.
Common mistakes
- Leap year handling
- Time zones
- Not accounting for month/day
When to use it
Use for forms, eligibility, birthdays.
Pro tips for the Age Calculator
- Use Print / PDF to export a clean, ad-free summary you can share with a client or advisor.
- The chart updates live — drag values up and down to build intuition for how the formula behaves.
- Change one input at a time to see which lever actually moves the answer the most.
Frequently asked questions
›Include time?
Only calendar days here.
›Time zones?
Uses your local time.
›Legal age?
Varies by jurisdiction.
›Age in days?
Shown in breakdown.
›Chinese age?
Adds 1 year at birth and Lunar New Year.
›Does the Age Calculator store the numbers I enter?
No. All math runs locally in your browser — nothing is sent to a server, and closing the tab discards the inputs unless you save them to favorites.
›Is the Age Calculator free to use?
Yes. Every calculator on CalcPilot, including the Age Calculator, is free with no sign-up, no watermark, and no export limit.
Embed this calculator
Drop the Age Calculator into your own site or blog post. Free to use — a small “Powered by CalcPilot” link is appreciated.
<iframe src="https://calcpilot.tools/calculators/age-calculator?embed=1" width="100%" height="720" style="border:1px solid #e5e7eb;border-radius:12px;max-width:720px;" loading="lazy" title="Age Calculator — CalcPilot"></iframe>Related calculators
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