Gravitational Force Calculator
Calculate the gravitational attraction between two masses with Newton's law of universal gravitation, F = G × m₁ × m₂ / r².
Formula: F = G × m₁ × m₂ / r²
About Gravitational Force Calculator
Gravitational Force Calculator is a free online calculator that gives you an instant, accurate result as you type. Calculate the gravitational attraction between two masses with Newton's law of universal gravitation, F = G × m₁ × m₂ / r².
The calculation uses the standard formula F = G × m₁ × m₂ / r² and updates live with every change to the inputs. Everything runs client-side in your browser — fast, private, and free to use as often as you like.
The gravitational constant G = 6.674 × 10⁻¹¹ N·m²/kg² is so small that gravity is only noticeable when at least one mass is planet-sized.
Frequently Asked Questions
Is Gravitational Force Calculator free to use?
Yes. Gravitational Force Calculator is completely free, with no sign-up, no downloads, and no usage limits. You can use it as many times as you like on any device with a web browser.
How accurate is this calculator?
The calculator applies the standard formula (F = G × m₁ × m₂ / r²) with full floating-point precision and rounds only the displayed result. For most practical purposes the results are exact.
Why are the default values so large?
The defaults model a 1,000 kg satellite at Earth's surface (Earth mass 5.972 × 10²⁴ kg, radius 6,371 km), giving roughly 9,820 N — the object's weight.
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