Gravity Calculator

Calculate gravitational force between two objects using mass, distance, and gravitational constant.

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About This Tool

This gravity calculator implements Newton's Law of Universal Gravitation to compute the gravitational force between two objects. Simply enter the masses of both objects, the distance between their centers, and optionally adjust the gravitational constant. The calculator will instantly compute the gravitational force in newtons (N) and display the result with the complete calculation formula. Perfect for physics students, educators, and anyone needing to calculate gravitational interactions.

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How to Use

Enter the mass of the first object in kilograms (kg)
Enter the mass of the second object in kilograms (kg)
Enter the distance between the centers of the two objects in meters (m)
Optionally adjust the gravitational constant (default is
67430 × 10⁻¹¹ N·m²/kg²)
Click the 'Calculate Gravitational Force' button
View the calculated force in newtons (N) along with the detailed formula

Frequently Asked Questions

Find Quick Answers

What formula does this gravity calculator use?

The calculator uses Newton's Law of Universal Gravitation: F = G × (m₁ × m₂) / r², where F is gravitational force, G is the gravitational constant, m₁ and m₂ are the masses, and r is the distance between centers.

What units should I use for input values?

Use kilograms (kg) for masses, meters (m) for distance, and the calculator will output force in newtons (N). The gravitational constant is in N·m²/kg².

Can I calculate gravity for celestial bodies?

Yes, you can use this calculator for any two masses, including planets, stars, or everyday objects. Just ensure you use consistent SI units (kg and m).

What is the default gravitational constant value?

The default is 6.67430 × 10⁻¹¹ N·m²/kg², which is the 2018 CODATA recommended value. You can adjust this if needed for specific calculations.

Need to run multiple calculations?

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