Mars
About 38% of Earth weight
A 150 lb Earth reading becomes about 57 lb on Mars. A 70 kg Earth reading becomes about 26.6 kg on a Mars-calibrated scale.
Solar system · Question
Mars weight calculator: your weight on every planet
On Mars, a scale would read about 38% of your Earth weight. Enter your weight once to compare Mars with all eight planets — your mass stays the same, but local gravity changes what the scale reads.
Visual model
Your weight, everywhere.
on Earth
Mercury
17.1 kg
0.38× Earth gravity
Venus
41.0 kg
0.91× Earth gravity
Earth
45.0 kg
1.00× Earth gravity
Mars
17.1 kg
0.38× Earth gravity
Jupiter
106.2 kg
2.36× Earth gravity
Saturn
41.4 kg
0.92× Earth gravity
Uranus
40.0 kg
0.89× Earth gravity
Neptune
50.4 kg
1.12× Earth gravity
Change one variable
Why doesn't 318× the mass mean 318× the gravity?
Change a planet's mass or radius independently to see why gravity depends on both. The circle shows radius; the arrow points toward the center.
g / gEarth = (M / MEarth) ÷ (R / REarth)²
The circle's radius has a linear Earth-relative scale (6 SVG units per Earth radius). It does not encode mass, density or real appearance. The arrow shows direction, not strength.
Mass1.0÷ radius²1.00
Idealized gravity
At Earth baseline, mass and radius are both 1. The gravity ratio is 1.
This is a spherical, non-rotating model, not measured effective gravity. Jupiter has ~317.8× Earth's mass and ~11.21× its equatorial radius, giving ~2.53× by this model. NASA reports ~2.36× effective equatorial gravity at Jupiter's 1-bar atmospheric reference level; rotation matters. Jupiter has no solid surface. NASA gravity equation ↗ · NASA Jupiter/Earth data ↗
Preparing the experiment. The equation and Earth baseline are readable now.
Quick answers
Planet weight calculator: the useful numbers first.
These are illustrative Earth-scale-equivalent readings based on NASA effective equatorial gravity ratios (Earth = 1.00). The calculator updates them for the kg or lb value entered; it does not model standing on gas giants.
Jupiter
About 2.36× Earth weight
NASA’s effective equatorial gravity at Jupiter’s atmospheric 1-bar level is about 2.36× Earth’s, not a solid ground surface a person could stand on.
Formula
Earth reading × gravity ratio
For a familiar scale reading, multiply your Earth value by the planet's gravity relative to Earth. Mass itself does not change when you move between planets.
What's simplified
Why isn't this just "bigger planet, more gravity"?
01
Density matters too
Saturn is bigger than Earth but less dense than water — its effective equatorial gravity (~0.92×) is slightly less than Earth's, while much smaller Mercury and much larger Neptune land close together too.
02
"Surface" is fuzzy on gas giants
Jupiter, Saturn, Uranus, and Neptune have no solid surface — the calculator uses NASA’s approximate equatorial effective gravity at a reference atmospheric level, not a solid surface. Gravity depends on latitude, rotation and altitude.
Misconception check
Quick check.
Quick check
Go deeper
Keep exploring.
Next in this series →
Planetary temperatures ↗
Why Venus is hotter than Mercury.
Orbits
Why don't planets fall into the Sun?
Gravity's other job: keeping planets in orbit instead of pulling them straight in.
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