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Surface Gravity Calculator
Calculate the surface gravity of a planet from its mass and radius.
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Gravity
Compare Your Options And Get Clear Answers
Calculate the surface gravity of a planet from its mass and radius.
Surface Gravity Estimator
Enter your numbers below for an instant estimate.
0
π‘ Tip: g = g_earth x M / R^2.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Surface Quick Guide
Typical values for reference.
| Mass (Earth) | Radius (Earth) | Spare | g m/s2 |
|---|---|---|---|
| 0.055 | 0.383 | – | 3.68 |
| 1 | 1 | – | 9.81 |
| 0.107 | 0.532 | – | 3.71 |
| 317.8 | 11.2 | – | 24.84 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Surface Gravity Calculator FAQ
Answers to common questions about this calculator.
Scaling.
It gives a quick estimate of surface gravity from the values you enter.
No. It is a planning estimate, so check important figures with a professional or official source.
Yes. Edit any field and the result updates when you calculate.