Life stats

How many days have you been alive?

Enter your birthday and watch your whole life turn into numbers — days lived, heartbeats, breaths, full moons you have seen, how old you would be on Mars, and the exact date of your next big milestone. Strangely moving, very shareable.

Month

Day

Year

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The math behind the numbers

We start from the exact number of days between your birth date and today, then layer on well-known averages: about 72 heartbeats and 16 breaths a minute, a full moon every 29.53 days, and each planet’s real orbital period for your cosmic ages. It all runs in your browser — your birthday is never stored.

Frequently asked questions

How many days have I been alive?

Enter your date of birth above and the tool counts the exact number of days since you were born, then turns it into heartbeats, breaths, full moons seen and your age across the solar system.

How is my age on other planets calculated?

A year on each planet is the time it takes to orbit the Sun. We divide the total days you have been alive by each planet’s orbital period, so you can see how old you would be on Mercury, Venus, Mars, Jupiter and Saturn.

What is the milestone date?

We find your next round 1,000-day milestone — like your 10,000th or 15,000th day alive — and tell you the exact calendar date it falls on, so you can actually celebrate it.