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Age calculator
Get the precise age in years, months, and days between a birth date and any reference date directly in your browser.
- 100% local
- Instant
- Free
- No account
- Works offline
The birth date must be valid and cannot be later than the reference date.
Exact age
Total duration
full months
full weeks
days
Next birthday
Why use this tool?
Calculate the precise age elapsed between a birth date and any reference date.
Smart processing
Generate, convert, or validate technical data with purpose-built controls.
Supported formats
Technical formats and syntaxes suited to each generator, converter, or validator.
Save time
Get a clean, ready-to-use result in seconds without installing software or configuring a complex workflow.
Guide
How to use this tool
- 1
Enter the birth date
Choose a valid birth date.
- 2
Choose the reference
Keep today or select another date.
- 3
Review the details
See exact age, totals and the next birthday.
Tips and best practices
- Calculations happen locally in your browser.
- The reference date can be used to calculate an age in the past.
- Displayed weeks are complete weeks.
Frequently asked questions
Does it account for different month lengths?
Yes. Exact age follows calendar years, months and days.
Can I calculate age on a past date?
Yes. Select that date as the reference date.
Are my dates uploaded?
No. The calculation stays entirely in your browser.
Was this tool useful?
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