Weight on Other Planets Calculator
Calculate your weight on the Moon, Mars, Jupiter, and all solar system planets. Explore gravity, jump heights, fall times, and custom exoplanet physics offline.
Solar System Planetary Weights
Computed across all 21 celestial bodies. Tap any planet card to inspect deep-dive kinematics below.
62.06% Lighter than on Earth
Newton's Universal Law of Gravitation
Where G is Newton's gravitational constant (6.67430 × 10⁻¹¹ m³ kg⁻¹ s⁻²), M is the planetary mass, R is the mean volumetric radius, and m is your mass.
Surface gravity accelerates all falling masses equally: g = G·M / R². Because your mass is invariant, your scale weight directly reflects local surface acceleration: W_body = W_earth × (g_body / g_earth).
Itemized Plaintext Audit Receipt
Deterministic, copyable verification log for academic notes and engineering audits.
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WEIGHT ON OTHER PLANETS - GRAVITY AUDIT RECEIPT
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Generated via OctalOne (100% Private Client-Side Tool)
Timestamp: 2026-09-06T12:00:00.000Z
Calculation Mode: TOUR
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INPUT PARAMETERS:
- Earth Weight / Mass: 70.00 kg
- Earth Standard Gravity: 9.80665 m/s² (1.0000 g)
- Target Celestial Body: Mars (Terrestrial Planet)
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GRAVITATIONAL PROPERTIES:
- Surface Gravity: 3.721 m/s²
- Body Mass: 6.4171e+23 kg (0.107 M_earth)
- Body Radius: 3,389.5 km (0.532 R_earth)
- Escape Velocity: 5.03 km/s (18,108 km/h)
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COMPUTED WEIGHT RESULTS:
- Weight on Celestial Body: 26.56 kg
- Gravitational Force: 260.47 Newtons (N)
- Relative Comparison: 62.06% Lighter than on Earth
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Verified 100% offline. No telemetry. Safe & Private.
=======================================================Astrophysics & Gravity Trivia
Galileo's Leaning Tower Experiment
In vacuum, all masses accelerate at the exact same rate regardless of weight. Apollo 15 astronaut David Scott famously confirmed this on the Moon by dropping a falcon feather and a hammer simultaneously—both hit lunar soil at the same instant!
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Frequently Asked Questions
Weight is the gravitational force exerted on an object's mass by a planet: W = m · g. Because surface gravity (g = G·M/R²) varies based on each celestial body's mass and radius, your weight changes proportionally: W_planet = W_earth × (g_planet / g_earth). Your intrinsic mass remains identical everywhere.
Gas and ice giants (Jupiter, Saturn, Uranus, Neptune) transition gradually from dense hydrogen/helium atmosphere to superheated metallic fluids without a hard boundary. By international astrophysical convention (IAU / NASA), surface gravity is calculated at the 1-bar atmospheric pressure level (100 kPa), equivalent to sea-level pressure on Earth.
Astronauts on the International Space Station (at 408 km altitude) experience continuous orbital freefall. While Earth's true gravity at that altitude is still 8.66 m/s² (88.3% of surface gravity), the ISS travels sideways at orbital speed (~7.67 km/s or 27,600 km/h) so that its falling trajectory matches Earth's curvature. Because both the station and astronauts fall together, apparent weight is zero (microgravity).
Assuming an astronaut exerts the same kinetic leg impulse energy as on Earth (constant takeoff velocity v0 = √(2·g_earth·h_earth)), jump height scales inversely with gravity: h_planet = h_earth × (g_earth / g_planet). Airborne hang time scales as t_hang = 2·v0 / g_planet. On the Moon (0.165g), an average 0.5m leap becomes a spectacular 3.02m leap with over 3.8 seconds of slow-motion hang time!
Among major cataloged bodies, the Sun exerts the highest surface gravity at 274.0 m/s² (~27.9g), where a 70 kg person would weigh 1,956 kg (19,180 N). The asteroid-belt dwarf planet Ceres has the lowest major gravity at 0.284 m/s² (~0.029g), where that same 70 kg person weighs just 2.03 kg (19.9 N).
Yes, 100%! All orbital kinematics, Newton gravitation equations, vector visualizer schematics, and receipt generation run purely in local browser memory with zero external API calls or network requests. Your calculations remain completely private and accessible anywhere.