​Coulomb's Law

Coulomb's law explains the electrostatic law between two point charges placed at a difference. According to this law

What is Coulomb's Law?

The force of attraction or repulsion between the charges is directly proportional to the product of their charges and inversely proportional to the square of the difference between them.

The force can be attractive or repulsive according to the charges they are either the same or different. This law helps you estimate the magnitude of the intensity of the force between the charges.

As this law gives you the value of, therefore the units will be Newton.


Formula of ​Coulomb's Law Calculator

You can demonstrate Coulomb’s Law in the form of symbols as represented below:

\[F = K\left( {\frac{{{q_1} \times {q_2}}}{{{r^2}}}} \right)\]


F = electrostatic force of attraction or repulsion

q1 = intensity of 1st point charge

q2 = intensity of 2nd point charge

r = distance between both of them

K = Coulomb’s constant

We have converted the sign of proportionality into the sign of equality therefore, we need to put the constant here.

The value for Ke remains the same throughout, you do not have to remember it. It is always 8.98755*109 N*m2/C2. If we see mathematically, the value for k is as follows:


To know about Ohm's law, you can use our Ohm's Law Calculator.

How to use ​Coulomb's Law Calculator?

The steps to use ​Coulomb's law calculator are as follows:

Step 1: Enter the value of the first charge in the first required input.

Step 2: Enter the value of the second charge in the second required input.

Step 3: Enter the value of distance in the third required input.

Step 4: The calculator will automatically display an answer on the screen.

Calculator use

What will be the benefit of using this calculator? You do not have to mess with complicated values. Moreover, the trouble of putting the values for ke will no more exist using this calculator. You simply have to put the magnitude and the distance between the charges and the force of attraction or repulsion will pop up on your screen without any complicated solution. So stop messing with the values and put them here for results.