Coulomb's Law Calculator
Fill in the values and the answer updates as you type.
How the Coulomb's Law Calculator works
F = k × q1 × q2 ÷ r², where k ≈ 8.9875 × 10⁹ N·m²/C². Like charges repel and opposite charges attract. Example: with Charge 1 2 µC, Charge 2 3 µC, and Distance 0.5 m, the result is Force (N) = 0.2157; Type of force = Repulsive.
Inputs and results
The Coulomb's Law Calculator takes 3 inputs and gives 2 results.
What you enter
- Charge 1 (µC) — starts at 2.
- Charge 2 (µC) — starts at 3.
- Distance (m) — starts at 0.5.
What you get
- Force (N)
- Type of force
Example: Coulomb's Law Calculator with the starting values
With charge 1 2 µC, charge 2 3 µC and distance 0.5 m, the calculator returns:
| Force (N) | 0.2157 |
|---|---|
| Type of force | Repulsive |
Change any value above and the results update straight away.
Coulomb's Law Calculator FAQ
How do I use the Coulomb's Law Calculator?
Enter charge 1, charge 2 and distance in the fields, then read force (n) and type of force in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Coulomb's Law Calculator calculate?
Electric force between two point charges. It returns force (n) and type of force from the 3 values you provide.
What values does the Coulomb's Law Calculator start with?
It opens with charge 1 2 µC, charge 2 3 µC and distance 0.5 m so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Coulomb's Law Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Coulomb's Law Calculator for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.