Age Calculator
Calculate your exact age in years, months, and days from your date of birth, plus total weeks, days, hours, and next birthday.
About This Free Online Age Calculator
Our free age calculator works out your exact age from your date of birth. Enter your birth date and an optional "age at" date, and instantly see your age in years, months, and days, along with the totals in months, weeks, days, and hours. It also counts down the days to your next birthday. The date math runs entirely in your browser, accounting for leap years and varying month lengths. Perfect for birthdays, forms, eligibility checks, and curiosity.
Features of Our Age Calculator
- Exact age in years, months, and days
- Totals in months, weeks, days, and hours
- Countdown to your next birthday
- Age at any chosen date, not just today
- Accounts for leap years and month lengths
- 100% private — browser-only date math
How to Use the Age Calculator
Using this tool is simple and requires no signup or registration. Follow these steps:
- Enter your date of birth.
- Leave "age at date" as today, or change it to any date.
- Read your exact age and the totals instantly.
- Check the days remaining until your next birthday.
Frequently Asked Questions About Age Calculator
How is exact age calculated?
The calculator counts full years from your birth date, then the remaining months, then the leftover days — accounting for leap years and that months have different lengths. This matches how age is normally counted.
Can I find my age on a future or past date?
Yes. Change the "age at date" field to any date to see how old you were, or will be, then.
Is my date of birth stored anywhere?
No. All calculations happen in your browser. Your date of birth is never uploaded, logged, or stored.
Why Choose Text Toolbox?
Text Toolbox provides free, private, and instant online text tools. Unlike other text utility websites that require signup accounts or send your data to servers, all our tools process your text entirely in your browser. This means your content never leaves your device — we cannot see it, store it, or share it. Our tools are fast, lightweight, and work on any device with a modern web browser.