Coulomb's Law
Calculate electrostatic force between two charges using Coulomb's law. Get accurate results with formula substitution and step-by-step output.
Key formula
F = k(q1q2 / r^2)
About this tool
Calculate electrostatic force between two charges using Coulomb's law. Get accurate results with formula substitution and step-by-step output.
How to use this calculator
- Choose the variable you want to solve for and confirm which values are already known.
- Enter inputs in consistent units before calculating so the formula is applied correctly.
- Check whether the result is physically reasonable by comparing it with the size of the inputs.
- Use the step-by-step breakdown to see how the equation was rearranged and evaluated.