MasterTool

Weight on Other Planets Calculator

Calculate weight on other planets instantly in your browser — the published formula, worked locally with no data sent anywhere.

NASA planetary surface-gravity ratios last updated · reference source

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Dated static reference; no live data is fetched. Verify current source values and assumptions before relying on results.

What this tool does

Calculate weight on other planets instantly in your browser — the published formula, worked locally with no data sent anywhere. Weight is the force of gravity on your mass, so it changes from body to body while mass (kg) stays fixed. Ratios use each body's nominal surface gravity; the gas giants have no solid surface, so their ratio is quoted at the 1-bar cloud level.

How to use the Weight on Other Planets Calculator

  1. Enter or select your weight on earth in lb.
  2. Enter or select body.
  3. Read the calculated result; change any measurement to compare alternatives.

Formula

weight on a body = Earth weight × surface-gravity ratio (NASA factsheet ratios: Mercury 0.378, Venus 0.907, Moon 0.166, Mars 0.377, Jupiter 2.36, Saturn 0.916, Uranus 0.889, Neptune 1.125). Mass itself never changes.
weight
Your weight on Earth (lb, before metric conversion)
planet
Body

Weight is the force of gravity on your mass, so it changes from body to body while mass (kg) stays fixed. Ratios use each body's nominal surface gravity; the gas giants have no solid surface, so their ratio is quoted at the 1-bar cloud level.

Worked example

For weight on other planets calculator, the following measurements illustrate the exact method: Your weight on Earth: 150; Body: mars.

Inputs

  • Your weight on Earth150 lb
  • BodyMars

Result

  • Weight on Mars (lb)56.55 lb
  • Surface gravity ratio (Earth = 1)0.38
  • Your mass — the same everywhere (kg)68.04

Results explained

Weight on Mars (lb)
Weight on Mars (lb) from the formula above, expressed in lb before metric conversion. Weight is the force of gravity on your mass, so it changes from body to body while mass (kg) stays fixed. Ratios use each body's nominal surface gravity; the gas giants have no solid surface, so their ratio is quoted at the 1-bar cloud level.
Surface gravity ratio (Earth = 1)
Surface gravity ratio (Earth = 1) from the formula above. Weight is the force of gravity on your mass, so it changes from body to body while mass (kg) stays fixed. Ratios use each body's nominal surface gravity; the gas giants have no solid surface, so their ratio is quoted at the 1-bar cloud level.
Your mass — the same everywhere (kg)
Your mass — the same everywhere (kg) from the formula above. Weight is the force of gravity on your mass, so it changes from body to body while mass (kg) stays fixed. Ratios use each body's nominal surface gravity; the gas giants have no solid surface, so their ratio is quoted at the 1-bar cloud level.

Frequently asked questions

weight on a body = Earth weight × surface-gravity ratio (NASA factsheet ratios: Mercury 0.378, Venus 0.907, Moon 0.166, Mars 0.377, Jupiter 2.36, Saturn 0.916, Uranus 0.889, Neptune 1.125). Mass itself never changes.

Weight is the force of gravity on your mass, so it changes from body to body while mass (kg) stays fixed. Ratios use each body's nominal surface gravity; the gas giants have no solid surface, so their ratio is quoted at the 1-bar cloud level.

Not necessarily — weight depends on both mass and radius (gravity = GM/r²). Neptune is far more massive than Uranus but also larger, so its surface gravity is only modestly higher.

Every field is labelled with its unit — enter values in exactly the labelled unit and read the result in the labelled output unit. Fields with a unit symbol also support the site-wide imperial/metric switch, which converts before the formula runs.

It uses double-precision arithmetic and the published constants and formulas named on this page. The last displayed digit may be rounded, and real conditions can differ from the idealized model described in the assumptions.

Yes. Every calculation runs entirely in your browser; nothing you enter is uploaded, stored or shared.