Calculate the attractive force between two masses using Newton's Law of Universal Gravitation.
Mass & Distance
Calculation Results
Enter masses and distance to calculate force
About this calculator
Overview
Every object in the universe with mass attracts every other object. This calculator uses Newton's Law: the force is proportional to the product of the masses and inversely proportional to the square of the distance between them.
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Pro Tips
The gravitational constant (G) is approx 6.674 × 10⁻¹¹ N·m²/kg².
Doubling the mass of one object doubles the force.
Doubling the distance reduces the force to one-fourth (Inverse Square Law).
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Fun Facts
"Gravity is the weakest of the four fundamental forces but governs the motion of planets and stars."
"The moon's gravity is strong enough to pull Earth's oceans, creating tides."
"Even though you have gravity, the attraction between two people is so small (approx 0.0000001 Newtons) that it's impossible to feel."
