Questions & answers.
Everything you might wonder about how BirthdayStats.com works.
What is BirthdayStats.com?
It's a free tool that turns any birthday into a rich, shareable report. Enter a date and you'll see your age on every planet, the moon phase the night you were born, your zodiac sign and life path number, a time capsule of your birth year, and dozens of other curious stats.
Is it free to use?
Completely free, with no account or sign-up. Just type in a date and explore.
How do you calculate my age on other planets?
We take the number of days you've been alive and divide it by the length of each planet's year — its orbital period. A year on Mercury is only about 88 Earth days, so you'd be ancient there. A year on Neptune lasts roughly 165 Earth years, so you'd barely have had a first birthday.
How accurate is the moon phase the day I was born?
Quite accurate. It's computed from the moon's roughly 29.53-day cycle, measured forward from a known reference new moon, so it lands on the correct phase for your birth date.
What is a life path number?
It's a number from numerology, found by adding up all the digits of your birth date and reducing them to a single digit (with 11, 22, and 33 kept as special "master numbers"). Each number is associated with a set of personality themes. It's for entertainment — fun to read, not science.
Where do the historical facts in the Time Capsule come from?
The events, famous people, music, movies, headlines, prices, and "didn't exist yet" items are generated for your exact date. They're designed to delight and are usually on the mark, but history is enormous and occasionally fuzzy — so treat them as a fun starting point and verify anything you plan to rely on.
Do you store or sell my birthday?
There's no account, no profile, and nothing to sign up for. The date you enter is used only to build your report. For the full details, see our Privacy page.
Can I print my report or share it?
Yes — three ways. Copy summary drops a tidy text version on your clipboard, Share opens your device's share sheet, and Print / Save as PDF produces a clean keepsake report. Add a name first and the report is personalized for the birthday person.
Why are some numbers (heartbeats, steps) "estimates"?
Things like heartbeats, breaths, blinks, and steps are based on typical human averages multiplied across your lifetime. Real bodies vary, so think of them as a fun ballpark rather than a precise count.
Does it work on my phone?
Yes. BirthdayStats.com is built mobile-first and works in any modern browser on phones, tablets, and computers.