🎓 Physics • Gravity
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Gravity Calculator (Newton’s Law)
Computes Newton's universal gravitational attraction between two masses and planetary surface gravity.
Orbital Mechanics & Celestial Gravitation
Orbital Mechanics & Gravitation Laboratory
Keplerian orbital periods, escape velocities, Vis-Viva orbital dynamics, surface gravity, and Solar System weight modeling.
100% Client-Side Physics
kg (165 lbs)
Surface Gravity (g)
9.82 m/s²
G-Force Ratio
1.001 G
Weight on Body
737 N (166 lbs)
Earth Weight Equiv
75.1 kg
What Would You Weigh Across the Universe?
Mercury28.5 kg63 lbs (0.38G)
Venus67.5 kg149 lbs (0.9G)
Earth75 kg165 lbs (1G)
Moon12.4 kg27 lbs (0.165G)
Mars28.5 kg63 lbs (0.38G)
Jupiter189.7 kg418 lbs (2.53G)
Saturn79.5 kg175 lbs (1.06G)
Titan10.5 kg23 lbs (0.14G)
Sun2092.5 kg4613 lbs (27.9G)
Sirius B (White Dwarf)30000000 kg66138600 lbs (400000G)
What is Universal Gravitation?
Every particle in the universe attracts every other particle with a force proportional to the product of their masses and inversely proportional to distance squared.
Formula & Step-by-Step Calculation
F = G · (m₁ · m₂) / r², g = G · M / R²
Newton’s universal gravitation law with G = 6.6743 × 10⁻¹¹ N·m²/kg².
Worked Step-by-Step Examples
Example 1
Mutual force between Earth and Moon
Solution: 1.98 × 10²⁰ Newtons
• Using G, mass of Earth, mass of Moon, and orbit distance.
Common Real-World & Academic Use Cases
- ✓ Satellite orbital calculations
- ✓ Exoplanet surface gravity estimations
- ✓ Oceanic tidal forces
How to Use the Gravity Calculator (Newton’s Law)
1
Select Two Bodies or Surface g
Choose calculation mode.
2
Input Masses & Distance
Enter parameters or click planet presets.
3
Review Force
Inspect gravitational attraction.
Frequently Asked Questions
Q: What is G?
G is Newton’s universal gravitational constant: 6.6743 × 10⁻¹¹ N·m²/kg².