Weight on Planets Calculator
What you would weigh on every planet and the Moon.
What it does
Weight is mass times local gravity, so the same body weighs differently on every world. Factors run from 0.166 on the Moon to 2.36 on Jupiter against 1 on Earth, all from NASA planetary data.
The tool above takes Earth weight with the destination world. It returns the local weight with the factor and the unchanging mass beside them.
The default 150 lb on Mars reads 56.5 lb at 0.377x. The Moon would read 24.9 lb while Jupiter reads 354 lb for the same person, whose mass stays 68 kg everywhere.
Factors follow the NASA planetary fact sheet ratios with NASA Space Math weight worksheets behind the W = Mg method. Both treat gas giant figures as cloud top gravity.
How to use
- Pick pounds or kilos for your Earth weight.
- Enter what the bathroom scale says at home.
- Pick the destination world.
- Read the local weight first for the fun number.
- Use mass for any real physics that follows.
Formula
- factor
- Surface gravity relative to Earth (NSSDC ratios).
- 0.166
- Moon factor behind astronaut bouncing.
- 2.36
- Jupiter cloud top factor.
Kilos convert to pounds first (x 2.20462), then run one factor table, so systems agree. Gas giant surfaces mean cloud tops; standing there is not on offer.
Worked example
Example: 150 lb on Mars
Imperial defaults: 150 lb, Mars.
- Factor: Mars 0.377x Earth.
- Weigh: 150 x 0.377 = 56.55, shown 56.5 lb.
- Mass: 150 / 2.20462 = 68 kg everywhere.
- Check: Moon would read 150 x 0.166 = 24.9 lb.
- Tool shows 56.5 lb, 0.377x Earth, 68 kg everywhere.
Reference table
| World | Factor | Weight |
|---|---|---|
| Moon | 0.166x | 24.9 lb |
| Mars | 0.377x | 56.5 lb |
| Venus | 0.907x | 136.1 lb |
| Jupiter | 2.36x | 354 lb |
| Neptune | 1.12x | 168 lb |
Limits
- Cloud top gravity for gas giants; no standing.
- Spacesuits and gear add uncounted mass.
- Factors are averages; local gravity varies.
- Fun numbers only, not mission planning.
Common mistakes
- Calling the result mass instead of weight.
- Using 2.53 Jupiter lore against this 2.36 table.
- Forgetting suits add tens of pounds.
- Mixing kilos with pound factors.
- Planning Mars menus off Moon weights.
Try it yourself
Quick checks. Answers sit tucked under each question.
150 lb on the Moon?
150 x 0.166 = 24.9 lb.
150 lb on Jupiter?
150 x 2.36 = 354 lb.
68 kg mass on Mars in kg?
68 x 0.377 = 25.6 kg of weight feel; mass stays 68 kg.
Questions
How much would I weigh on Mars?
Multiply Earth weight by 0.377: 150 lb becomes 56.5 lb.
Why lighter on the Moon?
Less mass below means weaker pull: 0.166x Earth gravity.
Does my mass change?
Never. Mass is matter amount; weight is gravity pull on it.
Jupiter 2.36 or 2.53?
This page uses NSSDC 2.36 cloud top; some tables quote polar values.
Heaviest rocky world?
Venus at 0.907x, nearly Earth weight.
Lightest visit?
Small asteroids near zero; the Moon is the lightest here.