# Coulomb's law

This online calculator calculates unknown (whether force, charge, or distance) using known values using Coulomb's law scalar formula. It can be used to solve physics problems.

### This page exists due to the efforts of the following people:

#### Michele

Created: 2016-09-30 16:48:01, Last updated: 2020-12-11 13:15:14

This content is licensed under Creative Commons Attribution/Share-Alike License 3.0 (Unported). That means you may freely redistribute or modify this content under the same license conditions and must attribute the original author by placing a hyperlink from your site to this work https://planetcalc.com/5971/. Also, please do not modify any references to the original work (if any) contained in this content.

The calculator below is about Coulomb's law. It allows you to calculate the unknown value (whether force, charge, or distance) using known values and scalar formula

The scalar form of the Coulomb’s law equation is:
$|\mathbf F|=k_e{|q_1q_2|\over r^2}\qquad$
where k is Coulomb's constant
$k=\frac{1}{4\pi\varepsilon_0}$
with epsilon (electrical constant) is ≈ $8.85418781762*10^{-12} F/m$

This calculator can be useful in solving school physics problems.
Typical problems could look like these:
Suppose a distance of 1.00 meter separates two point charges, each with a charge of +1.00 Coulomb. Determine the magnitude of the electrical force of repulsion between them

• Two balloons with charges of +3.37 µC and -8.21 µC attract each other with a force of 0.0626 Newton. Determine the separation distance between the two balloons.

Thus, first, you choose the value you want to get, then you fill in known values and receive the answer.

#### Coulomb's law

Digits after the decimal point: 2
Force

Force units

Charge

Charge units

Distance

Distance units

URL copied to clipboard

#### Similar calculators

PLANETCALC, Coulomb's law