About the Surface Gravity Calculator
Surface gravity of a planet or moon in m/s² and g, with the weight of an object there.
Also known as: gravity on other planets, g force planet, planet gravity calculator.
How to use this calculator
- Enter body, your mass.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
g = GM / r²
Worked example
Using the values pre-filled in the calculator above:
- Body: Mars
- Your mass = 70 kg
the calculator returns:
- Surface gravity: 3.7279 m/s²
- Relative to Earth: 0.3801 g
- Your weight there: 260.95 N
- Weighing scale reading: 26.61 kg