Electric Field Calculator

Electric Field from Charge & Distance

Charge Q (C)

Distance r (m)

Force on a Test Charge

Electric Field E (N/C)

Test Charge q (C)

Formula

E = kQ/r², where E is the electric field in N/C, k = 8.9875 × 10⁹ N·m²/C² (Coulomb's constant), Q is charge in coulombs, and r is distance in meters.

Frequently Asked Questions

What is an electric field?

An electric field is a region around a charged particle where other charged particles experience a force. It is a vector field pointing away from positive charges and toward negative charges.

What is the unit of electric field?

The electric field is measured in newtons per coulomb (N/C) or equivalently in volts per meter (V/m). Both units are identical.

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