Universal Gravitation Calculator
Calculate the gravitational force between two masses using Newton's Law of Universal Gravitation.
About this calculator
The Universal Gravitation Calculator on NumberCals is a free, mobile-friendly tool for anyone needing to calculate the gravitational force between two masses using newton's law of universal gravitation. Enter your values in the form below and the result is computed instantly — no sign-up, no installation, no waiting.
Formula used
F = G · m₁·m₂ / r², where G = 6.674 × 10⁻¹¹ N·m²/kg²
What you'll need
- Mass 1 (kg) (e.g. 5.972e24)
- Mass 2 (kg) (e.g. 7.342e22)
- Distance between centres (m) (e.g. 384400000)
What you'll get
- Gravitational Force (N)
Frequently Asked Questions
What's G? +
The gravitational constant, ≈ 6.674 × 10⁻¹¹ N·m²/kg². One of the hardest fundamental constants to measure precisely.
Why is gravity so weak? +
On the scale of individual objects, gravity is roughly 10³⁶ times weaker than electromagnetism. It dominates at large scales only because it's always attractive and never cancels out, unlike electric charge.