Ohm's Law Calculator
Solve for voltage, current, resistance, or power. Enter any two values.
// fill in any two fields — the rest are solved automatically
V — Voltage (V)
I — Current (A)
R — Resistance (Ω)
P — Power (W)
↑ enter values in any two fields above
▸ show formulas
V = I × R I = V / R R = V / I
P = V × I P = I² × R P = V² / R
P = V × I P = I² × R P = V² / R
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