Age Calculator
Find an exact age in years, months and days — and the days until the next birthday.
Runs in your browser — nothing is uploadedEnter values
Result
- Total months
- 321
- Total weeks
- 1,396
- Total days
- 9,777
- Until birthday #27
- 85 days
About Age Calculator
The Age Calculator gives an exact age in years, months and days from a date of birth, plus totals in months, weeks and days and the countdown to the next birthday. You can also calculate age on any other date — useful for eligibility rules that depend on age at a specific deadline.
Calculations happen in your browser and correctly account for leap years and months of different lengths.
When to use it
- Checking age limits for job, exam or admission applications.
- Calculating age for school enrollment cut-off dates.
- Finding the exact age of a child for medical or vaccination schedules.
- Counting down to birthdays and anniversaries.
Tips for better results
- Set “Age on” to the application closing date to check eligibility rules.
- Use the Date Difference Calculator for gaps between any two dates.
- Double-check the date format when copying a date from a document.
How to use the Age Calculator
- Enter the date of birth.
- Change "Age on" to calculate age at another date.
- See the age and totals instantly.
Frequently asked questions
How are leap-day birthdays handled?
For people born on 29 February, the birthday is counted on 28 February in years that aren't leap years.
Is my date of birth stored?
No. The calculation happens in your browser and nothing is saved or sent.
Why do some calculators give a slightly different age in days?
Methods differ in how they count partial months. This calculator counts complete years, then complete months, then remaining days, which matches how age is normally stated.
Can I calculate age in the past or future?
Yes. Change the “Age on” date to any date to see how old someone was or will be on that day.