Age Calculator

Free Age Calculator — Exact Age in Years, Months, Days & Hours

Knowing your exact age to the day is useful for a surprising number of situations — visa and passport applications that require exact age in months, medical contexts that use age in weeks or days, legal age requirements, historical research, and simply satisfying curiosity. This free Age Calculator computes your exact age from a birth date with precision to the year, month, day, hour, and minute, and tells you how many days remain until your next birthday.

Enter a birth date (and optionally a target date — defaults to today) and click Calculate. Results show age broken down into all units simultaneously: total years, remaining months, remaining days, total days alive, total hours, and a countdown to the next birthday.

The calculator correctly handles all calendar edge cases including leap years, February 29th birthdays, and varying month lengths throughout the year.

Age Calculation Use Cases

Visa and immigration. Many visa categories have exact age requirements in years and months. This calculator provides the precise breakdown needed for applications.

Medical and pediatric. Child development milestones, pediatric dosing, and medical records often require age in weeks or months rather than years.

Legal age verification. Determine the exact date someone reaches a legal age threshold — 18, 21, 65, or any other milestone.

Historical and genealogical research. Calculate the age of historical figures at the time of important events, or find the age of an ancestor from birth and death records.

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Frequently Asked Questions