See how old you'd be on other planets. Based on orbital periods. Fun and educational—runs in your browser.
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Discover your age across our solar system with our accurate planetary age calculator
Our free online planetary age calculator helps you determine how old you would be on other planets in our solar system. Since each planet has a different orbital period (time to orbit the Sun), your age varies dramatically from planet to planet. This educational tool uses precise astronomical data to calculate your exact age on Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.
Our calculator shows your age on different planets in our solar system. Enter your birth date to see how old you would be on Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. Each planet's orbital period determines your planetary age. For example, if you're 25 Earth years old, you'd be approximately 103.8 years old on Mercury (fast orbit) but only 0.21 years old on Neptune (slow orbit). Want to convert days between planets? See our Planetary Day Converter.
Calculating your age on other planets is based on each planet's orbital period—the time it takes for a planet to complete one full orbit around the Sun. Since each planet has a different orbital period, your age varies dramatically from planet to planet. Here's how to calculate your age on other planets:
Enter your birth date in the calculator above using the date picker. The calculator accepts dates from 1900 onwards. Make sure to use the full four-digit year (e.g., 1990-05-15).
Click the "Calculate My Planetary Age" button. The calculator determines your current age in Earth days by calculating the difference between your birth date and today's date.
The calculator divides your Earth age (in days) by each planet's orbital period to determine your age on that planet. For example, if you're 10,950 Earth days old (30 years), you'd be 10,950 ÷ 88 = 124.4 years old on Mercury, but only 10,950 ÷ 60,182 = 0.18 years old on Neptune.
Each planet displays your age in planetary years. Planets with shorter orbital periods (like Mercury at 88 Earth days) make you older, while planets with longer orbital periods (like Neptune at 165 Earth years) make you younger. The calculator also shows your age in Earth years equivalent for easy comparison.
The calculation formula is: Planetary Age = Earth Age (in days) ÷ Planet's Orbital Period (in Earth days). This method ensures accurate age calculations based on precise astronomical data for each planet's orbital period.
Calculate age on all 8 planets plus Pluto
Uses precise orbital period data
Instant calculations as you type
Works perfectly on all devices
Learn about planetary science
All calculations happen locally
Our calculator uses precise orbital period data for each planet, accounting for the exact number of Earth days it takes for each planet to orbit the Sun. The calculations are scientifically accurate and updated with the latest astronomical data.
Your age varies because each planet has a different orbital period. A 'year' on Mercury is only 88 Earth days, so you'd be older in Mercury years. On Jupiter, a year is 12 Earth years, so you'd be younger in Jupiter years.
Yes! We include Pluto in our calculations because it's still an interesting celestial body in our solar system. A year on Pluto is 248 Earth years, so you'd be very young in Pluto years!
Yes! You can calculate for any birth date from 1900 onwards. The calculator works for past, present, and even future dates (though future calculations show how old you'll be).
Absolutely! All calculations happen locally in your browser. We don't store, upload, or track any of your personal information. Your privacy is completely protected.
Yes! Click the 'Copy Results' button to copy your planetary ages to share with friends and family. It's a fun way to compare ages across the solar system.
To calculate your age on Saturn, enter your birth date in the calculator above. Saturn's year is 29.5 Earth years, so if you're 30 Earth years old, you'd be approximately 1.02 Saturn years old. The calculator shows your exact age on Saturn and all other planets.
Enter your birth date in the calculator above to see your age on all planets in our solar system. Each planet has a different orbital period, so your age varies. For example, if you're 25 Earth years old, you'd be older on planets with shorter years (like Mercury) and younger on planets with longer years (like Neptune).
Solar system age refers to calculating your age across all planets in our solar system. Our calculator shows your age on Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. Each planet's year length differs, so your age varies on each planet.
Start using our free planetary age calculator now. No registration required - just enter your birthday and discover your age across the solar system.