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Both calculators run independently — change the inputs on either side to compare results.

Tidal Force Calculator

Calculate the gravitational force between two celestial bodies separated by a given distance. Useful for understanding tidal interactions, orbital dynamics, and the gravitational pull between moons, planets, and stars.

Primary Mass (kg)

Secondary Mass (kg)

Distance (km)

Fill in the required fields to see your result.

Astronomy

Roche Limit Calculator

Find the critical orbital distance inside which a satellite is torn apart by tidal forces. Use it to understand ring formation, comet disruption, and satellite stability around planets.

Primary Radius (km)

Primary Density (kg/m³)

Satellite Density (kg/m³)

Fill in the required fields to see your result.

Key differences

	Tidal Force Calculator	Roche Limit Calculator
Category	Astronomy	Astronomy
Inputs required	3	3
Result	Tidal Force (N)	Roche Limit (km)
What it does	Calculate the gravitational force between two celestial bodies separated by a given distance. Useful for understanding tidal interactions, orbital dynamics, and the gravitational pull between moons, planets, and stars.	Find the critical orbital distance inside which a satellite is torn apart by tidal forces. Use it to understand ring formation, comet disruption, and satellite stability around planets.