Age Calculator
Calculate your exact age in years, months and days. Shows total days, hours, next birthday countdown and zodiac sign.
How to use the Age Calculator
Enter your date of birth
Select your date of birth from the date picker. The "Age on this date" defaults to today, so you get your current age immediately. Change the second date to calculate how old you were or will be on any specific date — useful for calculating age at retirement, a specific event, or a historical date.
Exact breakdown
The calculator shows your precise age in years, months and days — not just years. It also shows your age expressed entirely in months, days, hours, minutes and seconds for interesting comparisons. All calculations account for leap years and varying month lengths.
About 1 in 1,461 people are born on 29 February (a leap day). UK law treats leap-day babies as legally aging on 1 March in non-leap years. The longest-living leap-day baby on record was Anthony Aceves of California, who reached 25 'leap birthdays' — i.e. age 100.