How does the Coulombs Law Calculator work?

Input the magnitudes of two electric charges and the distance between them Then: The calculator applies F = k × |q₁ × q₂| / r² where k is Coulomb's constant Then: Results show the electrostatic force in Newtons.

Can you give an example of how to use the Coulombs Law Calculator?

Example: Input q₁ = 2 μC, q₂ = 3 μC, r = 0.5 m gives a result of F ≈ 0.216 N (Using k = 8.99 × 10⁹ N·m²/C²).

Is the Coulombs Law Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Coulombs Law Calculator?

Our Coulombs Law Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Coulombs Law Calculator

Coulomb's Law

Charge 1 (C)

Charge 2 (C)

Distance (m)

Coulomb's Law quantifies the electrostatic force between two charged particles. It states that the force is proportional to the product of the charges and inversely proportional to the square of the distance between them.

Symbol	Name	Unit	Description
F	k × \|q₁ × q₂\| / r² where k is Coulomb\'s constant	—	k × \|q₁ × q₂\| / r² where k is Coulomb\'s constant

Difficulty:intermediate

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Did You Know?

Charles-Augustin de Coulomb derived this law in 1785 using a sensitive torsion balance, one of the first precision instruments in physics.

References

›Coulomb's Law Guide

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