Use this age calculator online by date of birth to find your exact age between two dates — years, months, days, hours, minutes, and seconds.
Age is the difference between two dates: years, then remaining months, then remaining days. Leap years and varying month lengths are handled correctly. The tool also computes total days, weeks, hours, minutes, and seconds elapsed.
People reach for an age calculator for reasons well beyond curiosity. Parents check exact ages in months and weeks for infant milestones and vaccination schedules, since pediatric guidance is often given in weeks rather than years. Job applicants and HR staff use it to confirm eligibility for age-restricted roles, retirement benefits, or school enrollment cutoffs, where being off by a few days can matter. It's also common for verifying eligibility for a driver's license, voting, or a pension, and for legal or immigration paperwork that asks for age as of a specific date rather than today. Genealogists use the tool to work out how old a historical figure was at a given event by entering two arbitrary dates instead of today's date. Others simply want to know how many days old they are for a milestone celebration — the 10,000-day birthday is a popular one — or how many days remain until their next birthday. Because the calculation accounts for leap years automatically, it stays accurate for people born on or calculating spans that cross February 29.
It takes your birth date and time and the current date/time, then computes the elapsed duration — accounting for leap years — down to years, months, days, hours, minutes, and seconds.
No, it uses the standard Gregorian calendar, which covers the vast majority of use cases.
Yes — enter any target date instead of leaving it on today's date to see age as of that point in time.
Want more detail? Read How to Use Age Calculator: Practical Guide and Best Practices.