Age Calculator
Find out your exact age in years, months, and days — instantly and for free. Enter any date of birth and choose a reference date (today by default) to see a full breakdown including total weeks and days, plus a countdown to your next birthday. Nothing leaves your device.
Enter a date of birth to see results.
How It Works
Enter your date of birth
Pick any birth date from the calendar. The tool accepts dates going back hundreds of years, so it works for historical lookups too.
Choose a reference date
The "Age on Date" field defaults to today, but you can set it to any date — useful for checking how old someone was on a specific day.
See your results instantly
Your age appears as years, months, and days. Scroll down to see the breakdown in total months, weeks, and days — and a countdown to the next birthday.
Why users love this tool
- ✓ Your data never leaves your device — the calculation runs entirely in your browser, not on our servers, so the dates you enter are never stored or shared.
- ✓ Results in seconds — there's nothing to upload or download; the answer appears the moment you finish typing.
- ✓ No account needed — just open the page and start using it straight away.
How Age Is Calculated
Age is measured by counting full calendar years, months, and days elapsed since the date of birth. The calculation accounts for varying month lengths and leap years to give a precise result.
| Output | What it means |
|---|---|
| Years / Months / Days | Exact age expressed as complete calendar periods — e.g. "27 years, 3 months, 14 days". |
| Total months | Age converted entirely into months — useful for early childhood milestones. |
| Total weeks | Age expressed in complete 7-day weeks, including leap-year days. |
| Total days | The precise number of days between the birth date and the reference date. |
Common Uses
- Passport & visa applications: quickly confirm age in years and days for official forms.
- Baby & toddler milestones: track age in months and weeks during the early years.
- Anniversary events: find out how many days ago an event occurred.
- Retirement planning: check exact age against pension eligibility dates.
- Legal age verification: confirm whether someone has reached a specific age on a given date.
Features
- Exact age breakdown: years, months, and days — not just a rounded number.
- Multiple formats: total months, weeks, and days for different use cases.
- Next birthday countdown: see how many days until the next birthday.
- Custom reference date: calculate age on any past or future date.
- Fully private: nothing is uploaded or stored — the entire calculation runs in your browser.