Age Calculator

Enter your date of birth and leave the second field on today. The headline answer is your exact age — for example 45 years, 4 months and 28 days — and the table below gives the same span as a total number of days, weeks, months, hours and minutes.

The "days" row is the plain count from your date of birth to today, including every leap day along the way. It is a simple difference between two calendar dates, so it is exact rather than an approximation from an average year length.

In a leap year your birthday falls on 29 February. In a common year this calculator treats 28 February as the day you turn a year older, which is the same rule it uses everywhere else: adding a month or a year never rolls past the end of the target month. Some countries use 1 March for legal purposes, so check locally if it matters for a document.

Yes — that is what the second field is for. Set "as of" to any date and the answer is measured to that day instead of today. It works for future dates too, so you can see how old somebody will be at an event.

No. The whole calculation runs in your browser, and nothing you type leaves the page. A date of birth is commonly used to verify identity, so this is one of the tools where that guarantee is worth stating plainly.

Because the calculation never converts your dates to a timestamp. Many calculators parse a date as midnight UTC, which shifts it by a day for anyone far enough east or west. This one treats the dates as plain calendar dates, so it gives the same answer everywhere.