Coulomb's Law Calculator
Calculate charge, distance, or force
Tan Chia Ling
iPhone Screenshots
Description
Calculate electrostatic force or charges between two particles using law. Input distance, charges, or force to get results. Copy outputs to other apps. Includes formulas and supports multiple units and up to 16 decimal places.
Coulomb's Law Calculator is a physics/math calculator used to find particle charge 1, particle charge 2, distance between particles, or electrostatic force between two charged particles quickly and easily.
Features:
- Instant calculation
- Results are copyable to other apps
- Formulas are included as references
- Supports up to 16 decimal places
- Supports various units for each input
Coulomb's law, or Coulomb's inverse-square law, is a law of physics that quantifies the amount of force with which stationary electrically charged particles repel or attract each other.
Coulomb's law states that the magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them.
Coulomb's Law Formula:
F = Ke * q1 * q2 /r²
where:
F - electrostatic force between charges (in Newtons)
q1 - magnitude of the first charge (in Coulombs)
q2 - magnitude of the second charge (in Coulombs)
r - shortest distance between the charges (in m)
Ke - Coulomb's constant. 9.988 * 10^9 N * m² / C².