Electromagnetics

Electromagnetics calculators and formulas for electric fields, charges, and capacitance. Covers Coulomb's law, electric field strength, and parallel plate capacitor calculations.

10Formulas

All levels Difficulty

Updated Oct 2026

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Fundamental

Electric Field Between Parallel Plates

E = V / d

Fundamental

Electric Field of a Point Charge

E = k * q / r^2

Fundamental

Poynting Vector

S = E × H

Fundamental

Electric Dipole Moment

p = q·d

Fundamental

Dielectric Constant Relation

C = ε_r·C₀

Fundamental

Electric Potential (Point Charge)

V = k·Q / r

Fundamental

Electric Potential Energy

U = q·V

Fundamental

Gauss's Law

∮E·dA = Q_enc / ε₀

Fundamental

Capacitance (Parallel Plate)

C = εA / d

Fundamental

Coulomb's Law

F = k·q₁q₂ / r²