About the Age Calculator
This Age Calculator computes the exact difference between two dates—typically your date of birth and today— and returns the result as years, months, and days. It’s useful for verifying official age requirements, planning birthdays and anniversaries, or simply learning how much time has elapsed between any two dates. Because it calculates a calendar‑accurate span, it properly accounts for different month lengths and leap years.
To get started, select your date of birth and a comparison date (which defaults to the current date). The tool then performs a precise date difference, breaking out years, months, and days so you can cite your age in a detailed format when forms or applications require it. You can also change the comparison date to compute age at a past or future point in time—for example, to check eligibility for school admissions, competitions, driving licenses, retirement benefits, or milestone celebrations.
Behind the scenes, age is not just the number of days divided by 365. The calculation walks the calendar from the start date to the end date, counting completed years first, then months, then remaining days. This approach handles real‑world complexities such as February 29 on leap years and months with 30 or 31 days. As a result, the output mirrors the way people commonly describe age—years, months, and days—rather than an approximation.
Key features
- Exact difference in years, months, and days
- Handles leap years and varying month lengths correctly
- Choose any comparison date (past or future)
- Great for official forms, eligibility checks, and planning
- Simple, mobile‑friendly interface
How to use
- Select your date of birth
- Pick the comparison date (defaults to today)
- View your exact age breakdown
Variables
| Symbol | Meaning |
|---|---|
| Start Date | Usually your date of birth (DOB) |
| End Date | Comparison date (defaults to today but can be changed) |
Examples
- DOB: 2000‑05‑15, Today: 2025‑08‑12 → Age shown in years, months, and days, accounting for leap years.
- Use a future end date to see your exact age on a specific event day (e.g., a competition cutoff).
- Use a past end date to confirm age at a historical milestone (e.g., graduation or employment start).
Tips
- If an official form requires age on a specific date, set that date as the comparison date.
- For eligibility rules measured in completed years only, focus on the years part of the result.
- When citing age spanning months and days, always copy the full breakdown to avoid rounding errors.