Age on Other Planets.
Find out how old you'd be on each planet in our solar system. Based on each planet's orbital period around the Sun.
Mercury
Terrestrial Planet1 Mercury year = 0.24 Earth years (87.97 Earth days)
1 solar day = 24h 39m
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Mars takes 686.98 Earth days to complete an orbit around the Sun — almost twice as long as Earth.
Day length is 24 hours 39 minutes (called a "Sol"), very similar to Earth's 24-hour cycle.
Surface gravity is 0.38g (38% of Earth). A 70 kg (154 lb) person would weigh only ~26.6 kg (58.5 lbs) here!
Distance: 1.52 AU (~227.9 million km). Average surface temperature: -63°C (-81°F).
Your age on each planet = your age in Earth days ÷ planet's orbital period (in Earth days).
Full age calculator →How Planetary Age Works.
A year on each planet is defined by how long it takes to orbit the Sun. Mercury orbits in just 88 Earth days, so if you're 30 on Earth, you're over 124 on Mercury! Neptune takes 165 Earth years for one orbit, so a 30-year-old on Earth is just 0.18 Neptune years old.
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