You need an age breakdown for personal reference, event planning, forms, or a past or future date.
Age Calculator
Calculate age in years, months, and days from a birth date to a target date.
Start here
Enter a birth date.
Browser-first
Your selected dates are calculated locally in your browser and are not uploaded to a server.
Useful for
Calculate age for forms
Age36 years 7 months 20 days
Full years old36 years
Days until next birthday133 days
Next birthday2027-01-01
Quick answer
Calculate age on today or another date
Enter a birth date and target date to calculate completed years, months, and days and see the countdown to the next birthday.
Official eligibility rules may use a specific cutoff date, local time, or legal definition, so verify the result against the governing instructions.
Date Difference: Calculate days between two dates, inclusive day counts, and rough week estimates locally in your browser.
About this tool
Calculate age in years, months, and days from a birth date to a target date.
Your selected dates are calculated locally in your browser and are not uploaded to a server.
How to use it
- Enter a birth date.
- Choose the target date or use today.
- Review the age and next-birthday countdown.
Common use cases
- Calculate age for forms
- Check exact age on a specific date
- See days until the next birthday
- Verify age against an application, event, or enrollment date
Age Calculation Notes
Age can be needed as a full year count or as a more exact years-months-days value. This calculator shows the exact difference between a birth date and a target date.
| Need | Which result to use | Reminder |
|---|---|---|
| Forms and records | Years, months, and days | Check the requested date basis. |
| Birthday planning | Days until next birthday | The target date can be today or a future date. |
| Date comparison | Use Date Difference too | Useful when the question is only about days between dates. |
Age Eligibility Checks
For applications, school enrollment, events, or benefit rules, the key detail is the target date. The same birthday can produce different eligibility results depending on the official cutoff date.
| Question | Target date to use | Reminder |
|---|---|---|
| How old am I today? | Today | Good for personal reference. |
| Can someone register for an event? | Event or registration cutoff date | Use the date stated in the rules. |
| School or program age cutoff | Official enrollment cutoff date | Do not rely only on birth year. |
| Birthday countdown | Today as the target date | The tool shows days until the next birthday. |
FAQ
Can I calculate age on a past date?
Yes. Choose any target date that is after the birth date.
Does it show the next birthday?
Yes. It shows how many days remain until the next birthday from the target date.
Can I use it for eligibility checks?
Yes, if you use the official cutoff date. Always follow the rule from the form, school, event, or agency.
Are dates uploaded?
No. The calculation runs locally in your browser.