basic

Coulomb's Law Electrostatic Force Between Two Charges Calculator

F = k·q₁·q₂/r² — force between point charges.

Calculates the electrostatic force between two point charges using Coulomb's law: F = k·|q₁·q₂|/r², where k = 8.9875×10⁹ N·m²/C².

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

C
C
m

Results

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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

F = k·|q₁·q₂|/r²

In depth

Calculates the electrostatic force between two point charges using Coulomb's law: F = k·|q₁·q₂|/r², where k = 8.9875×10⁹ N·m²/C².