GlenCalc

Coulomb’s law calculator

Like charges repel, opposite charges attract. Charges in coulombs (1 µC = 10⁻⁶ C).

Your answer

Force5.3925 NAttractive

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How we worked it out

Updated as you change the numbers.

  1. F = k q₁ q₂ ÷ r², k = 8.988 × 10⁹ N·m²/C².

Method and assumptions

For point charges in a vacuum (air is very close).

Questions

What is the force between 2 µC and −3 µC 10 cm apart?

About 5.39 N, attractive.

Sources

Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.

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