We and selected partners use cookies or similar technologies as specified in the cookie policy.
You can consent to the use of such technologies by closing this notice, by scrolling this page, by interacting with any link or button outside of this notice or by continuing to browse otherwise.
To find out more about the categories of personal information collected and the purposes for which such information will be used, please refer to our privacy policy.

California Consumer Notice

AC +/- ÷
7 8 9 ×
4 5 6 -
1 2 3 +
0 00 , =

Coulomb's Law Calculator

The online calculator of Coulomb's Law with a step-by-step solution helps you to calculate the force of interaction of two charges, electric charge, and also the distance between charges, the units of which can include any prefixes SI. The calculator automatically converts one unit to another and gives a detailed solution.

The calculator calculates:
Force interaction of two point charges.
Point electric charge.
Distance between charges.

The Electrostatic Force F Between Two Point Charges

Formula of force interaction of two point charges The force of interaction of two stationary point charges in a vacuum is directed along a straight line connecting these charges, is directly proportional to the product of the moduli of these charges and inversely proportional to the square of the distance between them. The electrostatic constant k = 8.9875517873681764 × 109. Force is measured in the SI unit of newtons and represented by the symbol F.
First charge q1 =
Second charge q2 =
Distance between charges r =
The SI unit of force F

Point Electric Charge Q

Formula Point Electric Charge Q A charge equal to one coulomb is characterized as a charge passing through the cross-section of a conductor, through which a constant current of 1 Ampere flows per second. Charge 1 coulomb is a charge that in a vacuum acts on the same charge equal to it, located at a distance of 1 meter with a force of 8.9875517873681764 × 109 Newtons.
Force F =
Second charge q2 =
Distance between charges r =
The SI unit of charge q1

Distance R Between Charges

Formula Distance R Between Charges Based on Coulomb's law, the distance between charges can be expressed as the square root of the quotient, where the numerator is the electrostatic constant k = 8.9875517873681764 × 109 multiplied by the product of the first and second charges, and the denominator is equal to the force F of the interaction of two charges.
First charge q1 =
Second charge q2 =
Force F =
The SI unit of distance r

You may also find the following calculators helpful
Physics Calculators


Speed Time Distance Calculator
Acceleration Speed Distance Calculator
Displacement Time Calculator
Time Calculator
Newton's Second Law Calculator
Gravitational Force Calculator
Momentum Calculator
Impulse Calculator
Object Weight Calculator


Light Reflection and Refraction Calculator

Electricity and Magnetism

Ohm's Law Calculator
Coulomb's Law Calculator
Electric Field Strength Calculator
Point Electric Charge Calculator Q
Force Acting on Charge Calculator
Distance From Charge Calculator
Potential Charge Energy Calculator
Electric Field Potential Calculator
Conductor and Sphere Capacitance Calculator


Capacitance of Parallel Plate, Cylindrical and Spherical Capacitors Calculator
Electric Field Strength in Parallel Plate, Cylindrical and Spherical Capacitors Calculator
Voltage (Potential Difference) of Parallel Plate, Cylindrical and Spherical Capacitors Calculator
Distance Between Plates in Parallel Plate Capacitor Calculator
Plate Area in Parallel Plate Capacitor Calculator
Energy Stored in Charged Capacitor Calculator
Energy Stored in Parallel Plate, Cylindrical and Spherical Charged Capacitors Calculator
Volumetric Energy Density of Parallel Plate, Cylindrical and Spherical Capacitors Calculator
Astronomy Calculators
Object Weight on Other Planets
Gravitational Acceleration on the Planets of the Solar System and Their Satellites
Length Converter
Speed Converter
Acceleration Converter
Calculators (Number theory)
Mathematical Expressions Calculator
Calculator Parentheses
Prime Factorization Calculator
Gcd and Lcm Calculator With Steps
Gcd and Lcm calculator using Euclidean algorithm
Gcd and Lcm Calculator for Any Number of Numbers
Break Down the Number Into Its Place Value
Divide a Number by a Ratio. Online Calculator With Steps
Percentage Calculator With Steps
Scientific Notation to Decimal Conversion Calculator
Scientific Notation Converter
Factorial Calculator With Steps
Logarithm Calculator
Quadratic Equations Calculator With Steps
Remainder Calculator
Root Calculator
Decimal Period Calculator
Big Number Calculator
Rounding Numbers Calculator
Properties of Roots and Exponents Calculator
Complex Number Calculator
Fraction Calculators
Simplifying Fractions Calculator
Improper to Mixed Fraction Calculator
Mixed Fraction to Improper Calculator
Fractions Calculator With Step by Step Solution
Raising a Fraction to a Power. Online Calculator.
Decimal to Fraction Calculator
Fraction to Decimal Calculator
Compare Fractions Calculator
Common Denominator Calculator
Trigonometers Calculators
Sine Calculator
Cosine Calculator
Tangent Calculator
Cotangent Calculator
Secant Calculator
Cosecant Calculator
Arcsine Calculator
Arccosine Calculator
Arctangent Calculator
Arccotangent Calculator
Arcsecant Calculator
Arccosecant Calculator
Numeral Systems Calculators
Roman Numeral Calculator
Roman Numerals From 1 to 3999
Numeral Systems Calculator
Binary Calculator. Addition, Subtraction, Multiplication and Division of Binary Numbers.
Area Calculators
Area of a Square Calculator
Area of a Rectangle Calculator
Combinatorics Calculators
Permutations of N Elements Calculator
Combinations of N Elements by M Calculator
Permutations of N Elements by M Calculator
Linear Algebra and Analytical Geometers Calculators
Matrix Addition and Subtraction Calculator
Matrix Multiplication Calculator
Matrix Transpose Calculator
Matrix Determinant Calculator
Inverse Matrix Calculator
Length of a Line Segment. Distance Between Points Online Calculator.
Vector Coordinates Calculator From Two Points
Vector Modulus (Length) Calculator
Vector Addition and Subtraction Calculator
Vector Dot Product Calculator. By Using the Length of the Vectors and Cosine of the Angle Between Vectors.
Vector Dot Product Calculator. By Using Vector Coordinates.
Vector Product Calculator. By Using Vector Coordinates.
Vector Triple Product Calculator
Vector Multiplication by Number Calculator
Angle Between Vectors Calculator
Vector Collinearity Check Calculator
Vector Coplanarity Calculator
Math Trainers
Addition Math Trainer
Subtraction Math Trainer
Multiplication Math Trainer
Division Math Trainer
Multiplication Table Math Trainer
Online Preschool Counting Trainer
Online Preschool Mindfulness Trainer
Online Addition Subtraction Multiplication Division Math Trainer. Find the Correct Answer.
Online Numeric Expression Trainer
Random Number Generator
Password Generator