basic

Electric Field from Point Charge Calculator

E = kQ/r² — field strength around a point charge.

Computes the electric field magnitude at a distance r from a point charge Q using Coulomb's constant.

Nadia Almasri By Nadia Almasri
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see 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

E = kQ/r²; k = 8.988×10⁹ N·m²/C²

In depth

Computes the electric field magnitude at a distance r from a point charge Q using Coulomb's constant.