Calculate your exact age in years, months, weeks, days, hours and minutes. Find how many days until your next birthday — perfect for documents, planning and milestone tracking.
Select your birth date using the date picker. You can also set a custom "Age As Of" date to calculate age at any point in history or the future — useful for checking age eligibility on a past date.
The calculator instantly computes your exact age accounting for leap years, month lengths and all calendar irregularities. Results show your age broken down into every unit simultaneously.
See your age in years, months, days, total weeks, total days, total hours and total minutes. A birthday countdown shows exactly how many days remain until your next birthday.
The calculator uses precise date arithmetic that automatically accounts for leap years (February 29). Whether you were born on February 29 or your birthday falls near a leap day, the calculation correctly counts every day without any manual adjustment needed.
Yes — change the "Age As Of" field to any date in the past or future. This is useful for checking whether someone was a certain age on a specific date, verifying age eligibility for historical events, or calculating a child age on a future school enrollment date.
Age (as calculated here) is your standard calendar age — how many complete years have passed since your birth date. Chronological age in medical or developmental contexts can mean the same thing, but may also factor in gestational age for premature births. See our dedicated Chronological Age Calculator for the medical definition.
Because not all years have 365 days — leap years have 366. Additionally, months have different lengths (28–31 days). The calculator counts every actual calendar day between the two dates rather than using an approximation, giving you a precise total day count.
The tool finds the next occurrence of your birth month and day in the current or upcoming year. If your birthday has already passed this year, it counts forward to next year date. Leap day birthdays (February 29) use March 1 as the proxy in non-leap years for the countdown.
Absolutely — you can calculate the age of anything with a known start date: a business, a website, a marriage, a vehicle, a building, or an event. Simply enter the founding or creation date as the "date of birth" field.
The hours and minutes calculation is based on the total number of days multiplied by 24 hours and 60 minutes respectively. Since we dont know your exact birth time, this represents the age from midnight of your birth date. For a more precise result, the calculation is correct to the day.
The calculator uses JavaScript Date object which supports dates from roughly 271,821 BCE to 275,760 CE — far beyond any practical human lifespan. For historical figures born hundreds of years ago, the tool will correctly calculate the age at death or the present date.
Because the months display shows complete months elapsed since your last birthday, not just your year count times 12. For example, if you are 25 years and 7 months old, the months field shows 7 (the remainder beyond complete years), while total months since birth would be 307.
Yes — enter your date of birth and set the "Age As Of" date to your planned retirement date to find your exact age on that day. This helps confirm eligibility for age-based benefits, Social Security milestones (62, 65, 67), pension vesting dates, and similar age thresholds.
