Roche Limit
Calculate Roche Limit instantly with the exact formula and a worked example.
Roche Limit
Planet radius, km
Planet/moon density
Roche, km
6,770.1977
More about: Roche Limit
What it calculates
The “Roche Limit” calculator computes Roche, km from 2 parameters: planet radius, km, planet/moon density.
An astronomy calculation for enthusiasts and scientists.
Example calculation
With parameters Planet radius, km = 6,371, Planet/moon density = 0.6 the result is 6,770.2.
How to use
- Enter planet radius, km and planet/moon density — each field above is adjustable with a slider.
- Roche, km is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Roche Limit calculated?
The Roche Limit calculator computes Roche, km from planet radius, km, planet/moon density. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Roche Limit calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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