Gravity on Other Planets

Surface gravity table for solar system bodies.

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General calculation reads

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How to use this calculator

  • Enter your Earth mass/weight.
  • Read equivalent on each body.

About this calculator

Surface gravity table: g varies wildly across the solar system. Mercury & Mars share ~3.7 m/s² (about ⅜ Earth). Moon: 1.62 (just 1/6). Jupiter: 24.79 (2.5×!). Saturn comparable to Earth despite much greater mass — because of larger radius (g = GM/r²). Pluto: 0.62, near-weightless.

Frequently asked

Why so different?+
g = GM/r². Combination of mass and radius. Big-mass-big-radius (Saturn) ≈ small-mass-small-radius (Earth).
Weight vs. mass?+
Mass: kg, constant. Weight: N or lbf, depends on local g.
Most extreme?+
Lowest: Pluto (0.62). Highest planet: Jupiter (24.79). Highest body: Sun (274 m/s² but uninhabitable).
Effect on humans?+
Long-term low-g (Mars, Moon): bone loss, muscle atrophy. High-g: cardiovascular stress, hard to move.
Why is Saturn close to Earth?+
95× Earth's mass but 9.5× radius. Mass scales 95×, r² scales 90×. Cancels out for surface g.

Related calculators

Weight on Other Planets
W = m × g_planet. Earth weight × planet gravity ratio.
Wind Speed mph ↔ Knots
1 knot = 1.15078 mph = 1.852 km/h. Bidirectional, also m/s.
Temperature Rankine ↔ Fahrenheit
R = F + 459.67. Rankine is absolute (0 = absolute zero); Fahrenheit + 460.
Pressure psi ↔ bar
1 bar = 14.5038 psi = 100 kPa = 0.987 atm.
Pressure bar ↔ atm
1 atm = 1.01325 bar = 14.696 psi.
Time Seconds ↔ Minutes / Hours
Convert seconds to days/hours/minutes/seconds; auto-format hh:mm:ss.

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Weight on Other Planets
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W = m × g_planet. Earth weight × planet gravity ratio.

Wind Speed mph ↔ Knots
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1 knot = 1.15078 mph = 1.852 km/h. Bidirectional, also m/s.

Temperature Rankine ↔ Fahrenheit
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R = F + 459.67. Rankine is absolute (0 = absolute zero); Fahrenheit + 460.

Pressure psi ↔ bar
Calc

1 bar = 14.5038 psi = 100 kPa = 0.987 atm.

Pressure bar ↔ atm
Calc

1 atm = 1.01325 bar = 14.696 psi.

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