Exact Age Calculator: Years, Months, Days Lived
Age down to years, months, and days — plus the total days, hours, minutes, and seconds since birth
Works out an exact age in years, months, and days, and counts the total days, hours, minutes, and seconds elapsed since birth. It's built for the forms that demand precision — job applications and contracts that want age stated in years and months, not just a round number — and the copy button hands you the result as text you can paste straight in. Change the reference date to get someone's age at a specific past or future date, with the countdown to the next birthday shown alongside. Everything is computed instantly in your browser, so the dates you enter never reach a server.
🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
How to use
- Enter the date of birth.
- Enter the reference date (it defaults to today).
- Your exact age, total time elapsed, and next-birthday countdown appear automatically.
- Use the copy button to copy the results as text.
FAQ
- How is the age calculated?
- It takes the difference in years, months, and days between the date of birth and the reference date. If the birthday hasn't come around yet this year, the result is adjusted automatically so the age is exact.
- Can I use a reference date other than today?
- Yes. You can set the reference date to any day you like, so you can find someone's age at a specific point in the past or future.
- Is the birth date I enter stored anywhere?
- No. All calculations happen locally in your browser, with nothing sent to or saved on a server.