Age Calculator — Free Online Tool
Work out your exact age in years, months, days and total days from your birth date.
About Age Calculator
The Age Calculator works out exactly how old you are from your date of birth, breaking your age down into years, months and days rather than just a rounded number of years. It is handy for filling in forms, checking eligibility ages or simply satisfying your curiosity about a precise milestone.
You can also pick any "age at" date to see how old someone was (or will be) on a specific day, and the tool adds bonus totals such as your age in days, weeks and months. Everything runs in your browser, so your birth date is never sent anywhere.
How to Use Age Calculator
- Select your date of birth using the first date picker.
- Optionally change the "Age at Date" field to calculate your age on a specific day instead of today.
- Click "Calculate Age" to see your exact age in years, months and days.
- Review the extra totals for your age in days, weeks and months.
Key Features
Exact age in years, months and days
Calculate age as of any chosen date, past or future
Bonus totals: age in days, weeks and months
Instant results with no signup required
Runs entirely in your browser for full privacy
Frequently Asked Questions
How is my exact age calculated?
The tool subtracts your date of birth from the chosen date, carrying over days and months correctly so you get a true years, months and days result rather than a simple decimal.
Can I find my age on a future date?
Yes. Change the "Age at Date" field to any future day and the calculator will show how old you will be on that date.
What does total days mean?
Total days is the complete number of days you have been alive up to the selected date, which is useful for celebrating day-based milestones like your 10,000th day.
Is my birth date stored anywhere?
No. The calculation happens locally in your browser and your date of birth is never uploaded or saved on any server.