Calculate your exact age in years, months, days, and hours from any date of birth. See how many days until your next birthday.
Enter a date of birth and instantly see the exact age broken down into years, months, days, and hours. The tool also shows how many days remain until the next birthday. Works for any date in the past — useful for checking ages, calculating anniversaries, or satisfying idle curiosity.
Pick a date of birth using the date picker. All age breakdowns update immediately. The result also shows how many days until the next birthday.
People often talk about age as if it were just the current year minus the birth year. That is good enough for casual conversation, but it stops being good enough as soon as the exact answer matters. Month lengths differ, leap years exist, and a birthday that is close but not yet reached changes the result.
This tool is useful because it handles the calendar detail cleanly and gives a precise answer without making you reason through dates manually.
Many situations do not need a rough age. They need the correct current age as of today.
If you are tracking a child’s age, comparing siblings, or planning around a birthday, the difference between “almost” and “already” matters more than people expect.
A lot of people want more than the headline age. They want the fuller breakdown in years, months, days, or time until the next birthday.
If a birthday has not happened yet this year, the rough subtraction is wrong.
A month is not a fixed block of days, so mental shortcuts break down quickly.
Most of the time the difference is small, but it is exactly the kind of small detail that causes avoidable errors in date-based answers.
If a document depends on age today, a precise calculation is safer than relying on memory or a rough estimate.
Knowing exactly how long remains until the next birthday is useful for reminders, celebrations, and milestone planning.
“Three years apart” is often less informative than a real breakdown when people want to understand the current gap.
This tool calculates age from a date. It does not interpret legal eligibility rules, verify identity, or replace official guidance where a policy defines age in a special way. It gives the calendar answer, not the legal one.
Age feels simple because everyone deals with birthdays, but date arithmetic is irregular enough to produce routine mistakes. Automating the calendar logic is the simplest way to avoid those mistakes.
Months are calculated as calendar months. For example, 15 Jan to 15 Feb is exactly 1 month regardless of how many days each month has.
Yes. The day calculation uses exact calendar dates, so February 29 birthdays and leap year differences are handled correctly.
This tool runs entirely in your browser. Nothing you type or paste is sent to any server — all processing happens locally on your device.
You can also pass a date to this tool using the date URL parameter (e.g., ?date=YYYY-MM-DD).
If you choose to save your date, it is stored in a local cookie and never leaves your device.