Coulomb's Law Calculator

Your details

Select which quantity you want to calculate. The other three become inputs.
First point charge. Negative values represent negative charge.
Second point charge. Negative values represent negative charge.
Separation between the two point charges.
Known electrostatic force. Positive = repulsion, negative = attraction.
Unit for force input or result.
ResultRepulsion
0.000002

Calculated value for the selected variable

Scientific notation1.798 x 10^-6 N
UnitN
Interaction typeRepulsion (like charges)
Force (N)0.000002N
Force (N)0.000002

Electrostatic force: 1.7975e-6 N.

  • The charges have the same sign, so the force pushes them apart.
  • The electrostatic force magnitude is 1.798e-6 N.
  • Coulomb's Law applies to stationary point charges in vacuum. In a medium, divide the force by the relative permittivity of that material.

Next stepDouble the distance to reduce the force to one-quarter; halve the distance to quadruple it. This inverse-square relationship is one of the fundamental patterns in physics.

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