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Age & Date Calculators

Precise, calendar-accurate calculators for ages, durations and birthdays.

Tools in this category

Age Calculator

Calculate your exact age in years, months and days.

Date Difference Calculator

Count the days, weeks, months and years between two dates.

Birthday Countdown

See exactly how many days, hours and minutes until your birthday.

Age in Days

Find out exactly how many days old you are — and your next big milestone.

Accurate date math, made simple

Months have different lengths and leap years add extra days, so counting by hand is error-prone. These calculators follow the real calendar to give exact answers in years, months, weeks and days.

Start with the Age Calculator, or jump to the tool that matches your question.

Frequently asked questions

Are leap years taken into account?

Yes. Every calculator uses the real Gregorian calendar, including 29 February in leap years.

Which time zone do the calculators use?

Dates are treated as whole calendar days, so the results are the same wherever you are.

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