Coulomb's Law Calculator

Online Coulomb's law calculator to calculate electrostatic force between two charges (Q1 and Q2). The Coulomb's law states that like charges repel and opposite charges attract, with a force proportional to the product of the charges and inversely proportional to the square of the distance between them. In the below coulomb's law calculator enter the values for the point charge, distance, force and calculate the electrostatic force / magnitude of electric force between two charges.

Calculate Electrostatic Force Between Two Charges

X 10 C
X 10 C
meter
N

Online Coulomb's law calculator to calculate electrostatic force between two charges (Q1 and Q2). The Coulomb's law states that like charges repel and opposite charges attract, with a force proportional to the product of the charges and inversely proportional to the square of the distance between them. In the below coulomb's law calculator enter the values for the point charge, distance, force and calculate the electrostatic force / magnitude of electric force between two charges.

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Formula :

F = K x ( Q1 x Q2 ) / r2 K = 1 / ( 4πε0 )
Where, K = Coulomb constant = 8.99 x 10^9 Q1 & Q2 = Points charge r = Distance F = Electrostatic Force

Example

A point charge of 12.00 x 10-9 C is 15m distant from a second point charge of 6.80 x 10-9 C. Calculate the magnitude of the electrostatic force on each charge

Q1 = 12.00 x 10-9 C
Q2 = 6.80 x 10-9 C
r = 15 m
F = ( (8.99 x 109 x 12.00 x 10-9 ) x ( 6.80 x 10-9) ) / (15)2 )
F =( 8990000000 x 0.000000012 x 0.0000000068 ) / (225)
F = 0.000000733584 / 225 = 0.0000000032640000000000003
F = 3.2640000000000003-9
F = 3.2640 N

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