Age Calculator
Find your exact age in years, months, and days — plus totals and days until your next birthday.
Reviewed by the WorldCalcs team · Methodology · Last reviewed: June 2026
Your age
26 y 5 m 9 d
Total months
317
Total weeks
1 379.6
Total days
9 657
Days to next birthday
205
What is an age calculator?
An age calculator works out exactly how old someone is on a given date — in years, months and days — plus totals in months, weeks and days, and the number of days until their next birthday.
How it's calculated
It compares the date of birth with the chosen date, counting completed years first, then the remaining months and days. Totals use whole calendar days (UTC-based), so leap years and daylight saving never cause an off-by-one error.
Example
Someone born on 31 December 1990 is, on 7 June 2026, 35 years, 5 months and 7 days old — that is 12 942 days in total, with 207 days until their next birthday.
All calculations happen in your browser. Nothing is sent, stored, or tracked.
Results are estimates and may contain errors — for general information only, not professional advice. Always verify before relying on them. Disclaimer
How to use
Enter your date of birth. By default the calculator shows your age today, but you can change the "age at date" field to any date — past or future.
The result shows years, months and days, plus totals (months, weeks, days lived) and the number of days until your next birthday from the chosen date.
Everything runs in your browser. Nothing is uploaded, saved, or tracked.