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Coulomb Force Calculator

Use this online coulomb force calculator with labeled inputs and a worked example. F = kq₁q₂/r².

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  1. 01

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electrostatic force calculator online

Use coulomb force calculator online with the physical quantities shown below. Point charges in vacuum; signed scalar labels attraction versus repulsion.

How to use it

Enter Signed first charge (C). Set Signed second charge (C), Separation (m). Select Calculate, check the result units, then copy or download the JSON result.

Options and example settings

OptionChoices / valueExample default
Signed first charge (C)Main input. Decimal or scientific notation. 0.000001
Signed second charge (C)Option. Decimal or scientific notation. 0.000002
Separation (m)Option. Decimal or scientific notation. Positive values only. 0.1

Calculation method

F = kq₁q₂/r²

Worked examples

Worked case for coulomb force calculator. Point charges in vacuum; signed scalar labels attraction versus repulsion.

Coulomb Force Calculator — example with explicit inputs

Settings: Signed second charge (C): 0.000002; Separation (m): 0.1

Input:

0.000001

Expected result for the example input and options:

Output:

{
  "signed_force_N": 1.7975103584599992,
  "meaning": "Positive: repulsion; negative: attraction."
}

Limitations and common mistakes

  • Point charges in vacuum; signed scalar labels attraction versus repulsion.
  • Match every input to its displayed unit; scientific notation such as 1e-6 is accepted.
  • This is the documented idealized model; real systems may require additional effects and measurement uncertainty.

Frequently asked questions

How can I use electrostatic force calculator online?

Enter Signed first charge (C). Set Signed second charge (C), Separation (m). Select Calculate, check the result units, then copy or download the JSON result.

Which model does Coulomb Force Calculator use?

F = kq₁q₂/r². Point charges in vacuum; signed scalar labels attraction versus repulsion.

Technical references

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.

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