Age Calculator — Calculate Exact Age in Years, Months, Days
Calculate exact age from a birthdate to today or any specific date. Shows years, months, and days — useful for HR, legal documents, and birthday planning.
Why Use an Age Calculator
Calculating an exact age sounds simple but gets tricky at the edges: leap years, month-end dates, and counting whether to include the current day. This tool calculates the precise age in years, months, and days — useful for verifying eligibility, filling out official forms, or planning a milestone birthday.
- Years, months, and days: Full breakdown — not just total days or approximate years
- Leap year accurate: February 29 birthdays handled correctly across years
- Any target date: Calculate age on today's date or a specific future/past date
- HR and legal use: Verify minimum age requirements, calculate time since hire date
- Instant result: No forms to submit — result updates as you select dates
Choose the Right Variant
- This page: Age calculator — exact age in years, months, and days
- Time Difference Calculator: Calculate time between any two dates
- Days Between Dates: Count total days between two dates
- Time Until Deadline: Days and hours remaining until a future date
Step-by-Step Tutorial
- Open the Time Difference Calculator
- Enter the birthdate as the start date
- Leave the end date as today's date, or enter a specific date (e.g., a future birthday)
- The calculator shows the difference in years, months, days, and hours
- The years value is the person's current age; months and days show how far into the next year they are
Age Eligibility Reference
- Driving license (US): 16 years (learner's permit), 17–18 years (full license, varies by state)
- Voting age: 18 years in most countries
- US retirement benefits (Social Security): Early at 62, full retirement age 66–67 depending on birth year
- Medicare eligibility (US): 65 years
- Senior discounts: Commonly 60 or 65 depending on the organization
- School enrollment: Typically 5 years by a specific cutoff date (varies by district/country)
Privacy and Data Handling
All date calculations run locally in your browser. Birthdates and personal dates are not sent to any server and are not stored.
Frequently Asked Questions
What if someone was born on February 29 (leap day)?
Leap day birthdays are handled correctly. In non-leap years, the "birthday" for calculation purposes is typically treated as either February 28 or March 1, depending on jurisdiction and convention. For age eligibility purposes (legal age verification, retirement benefits), most countries treat Feb 29 birthdays as reaching the next age on Feb 28 in non-leap years — but verify the specific rule for your country or use case. The calculator uses standard date arithmetic which handles this correctly.
Does age include the current day?
Yes — if you calculate age on your birthday, you are considered to have reached that age on that day. Age is calculated as the number of complete years from the birth date to the target date. For example, if born on April 23, 2000, on April 23, 2024, the age is exactly 24 years — not 23 years and 365 days.
How do I calculate someone's age on a specific future date?
Enter the birthdate as the start date and the future date as the end date. This is useful for: calculating age at a future retirement date, verifying someone will be old enough for a program they're applying to, or planning milestone birthday events. The calculator shows the exact age at that future point in years, months, and days.