Electric Field Calculator
Compute electric field from a point charge: E = kQ/r², or from force/charge: E = F/q.
Result
Electric field magnitude
898,755.1787 N/C
898.7552 kV/m.
- k (Coulomb const)8.988 × 10⁹ N·m²/C²
- MethodkQ/r²
- Result898,755.178737 N/C = V/m
Step-by-step
- E = kQ/r² = (8.988e9 × 0.000001) / 0.1² = 898,755.1787 N/C.
How to use this calculator
- Pick the mode.
- Enter charge in Coulombs (or force in N) and distance in meters (or test charge in C).
- Read field magnitude.
About this calculator
Electric field describes the force per unit charge that a test particle would feel. From a point charge: E = kQ/r² where k = 8.988×10⁹ N·m²/C². Field has units of N/C (equivalently V/m). Point inward from a negative charge, outward from positive.
Frequently asked
k = 8.988 × 10⁹ N·m²/C² (or 1/(4πε₀)). Sometimes called the electrostatic constant.
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