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The age calculator computes your exact age in years, months, weeks, days — and even hours — from your date of birth to today or any target date. It's the most precise free online age calculator, correctly accounting for leap years, varying month lengths, and timezone differences.
Enter your date of birth and the calculator instantly displays your exact age broken down into multiple units: years, months, weeks, days, hours, and even minutes. You can also calculate your age on any future or past date.
Legal and administrative uses of age calculation include retirement eligibility, voting age verification, insurance premium calculations, school enrollment cutoffs, and senior discount qualifications.
Reach for this calculator when precision matters more than rough approximation — whether that is for a financial decision, a planning task, or simply getting the right answer the first time.
The most frequent error is using approximate inputs in a precise calculation and treating the result as if it were exact. The output is only as accurate as the inputs — imprecise measurements or estimated values produce imprecise results.
A freelancer calculates the exact number of working days between a project start and deadline, accounting for weekends and public holidays. The result tells them whether the timeline is achievable before accepting the brief — not after.
Age Calculation
Age = Target Date − Birth Date
(accounting for month lengths and leap years)
Subtract the birth date from the target date, accounting for the actual number of days in each month and leap years (366 days).
Someone born on 15 March 1990 — what is their age on 14 March 2026?
Result: Age = 35 years, 11 months, 27 days (one day before their 36th birthday)
Accurate to the exact day, correctly handling all leap years, months of different lengths, and year boundaries.
Yes. Enter any start date (birth date) and any target date to calculate the precise age or time difference between them.
Set your birth date and the target date to your next birthday — the calculator will show 0 years, 0 months, 0 days on that exact day.
Free, fast, and easy. Use 722 calculators and 108 tools. No sign-up. Get instant results for math, money, health, and more.
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