Coulombs Law Calculator
Use the Coulombs Law Calculator for a transparent, instant calculation with validated inputs and cited sources. For a query such as “coulomb's law electrostatic force”, enter the matching values and units below and review the stated assumptions. The same model applies to the related search “coulomb's law” only when it uses the displayed inputs and assumptions.
How to use this calculator
Enter the requested values and units.
Review the assumptions and any warnings shown with the result.
Use the result together with the cited source and your real-world requirements.
Formula
Electrostatic force magnitude = k|q₁q₂| ÷ r².
Worked example
Worked example: Inputs: Charge q₁: 0.000001 C; Charge q₂: 0.000002 C; Separation: 0.1 m. Outputs: Electrostatic force: 1.79751 N.
Assumptions and limits
- The result depends on the values, units, and assumptions entered. It does not infer missing context.
Sources
- OpenStax, Rice University: University Physics Volume 2Reference material reviewed for the stated method, units, or domain. Confirm that its scope matches your use case. Reviewed 2026-08-14.
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Frequently asked questions
How does the Coulombs Law Calculator work?
Electrostatic force magnitude = k|q₁q₂| ÷ r².
What should I enter?
Charge q₁, Charge q₂, Separation
What should I verify?
Review the assumptions and any warnings shown with the result. The result depends on the values, units, and assumptions entered. It does not infer missing context.
Last updated 2026-08-14 · science-coulombs-law-v1 · opportunity-content-2026-08-14 · Trusty Calculator Editorial Team