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How Old Am I? Age Calculator

Find out exactly how old you are. Enter your date of birth for your age in years, months and days, your total days alive, zodiac sign and next birthday - free, instant.

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Wondering how old you are right now? Enter your date of birth and this calculator shows your exact age down to the second - years, months and days, plus total weeks, days and hours that keep ticking live. You'll also get your zodiac sign and a countdown to your next birthday.

Pick a valid birth date (and a reference date on or after it).

How to use it

  1. Pick your birth date

    Drop the day, month and year of your birth into the date picker.

  2. Optionally set a reference date

    Leave it blank for today (live), or choose any date to find your age exactly then.

  3. Read the breakdown

    Years/months/days first, then total months, weeks, days, hours, minutes and seconds, plus your zodiac signs.

  4. Check your next birthday or share

    See the countdown, weekday and milestone age, then use Copy link to save or send the result.

What is it?

An age calculator measures the time from a given birth date to a reference date (today by default), broken down into every useful unit: years, months and days for documents; total weeks, days, hours, minutes and seconds for trivia and milestones. The maths uses ISO-8601 calendar arithmetic - months and days are decremented in a way that matches what banks, insurance companies and government forms use, so the result is the legal age in any practical context.

When to use it

Whenever a form asks for an age in a specific unit and your birth date is in another. Pension and benefit eligibility forms, medical records, life-insurance applications, official identity documents, and trivia (how many days have you been alive?). Also useful for milestone planning: 'how many days until I turn 40?'

Common mistakes

Counting months as 30 days each - they aren't. February has 28 (or 29), most months have 30 or 31, and an 'age in days' calculation that ignores this drifts by days per year. Don't forget leap years: a person born on Feb 29 has only one literal birthday every four years; we count them on Feb 28 in non-leap years to match civil-law conventions.

FAQ

How is my exact age calculated?
We count whole years, then the leftover months, then the leftover days, using ISO-8601 calendar arithmetic - the same rules banks, insurers and government forms use. Months aren't treated as a flat 30 days, so the years/months/days result is the legal age in any practical context.
Can I find my age on a past or future date?
Yes. Leave the reference date blank to use today (it ticks live), or set it to any date - an exam day, a retirement date, a historical event - to get your age exactly on that date.
How many days have I been alive?
The breakdown shows your total months, weeks, days, hours, minutes and seconds. When the reference date is today, the seconds tick up live - handy for spotting milestones like your 10,000th day.
What zodiac signs does it show?
Both your Western sun sign (from the month and day of your birth) and your Chinese zodiac animal (from your birth year's 12-year cycle).
What if I was born on 29 February?
A leap-day birthday only falls on a real 29 February every four years. In common (non-leap) years we count the birthday on 28 February, matching the civil-law convention most countries use for legal age.
When is my next birthday?
We show the number of days until your next birthday, the weekday it falls on, and the age you'll be turning.

Age Calculator

Your exact age in years, months, days and live seconds - plus zodiac and next birthday.

Try it out →

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