Ohm's Law Calculator

V = I × R — Enter any two values to calculate the rest

Input Values

Enter exactly 2 values. The other fields will be calculated automatically.

Results

Voltage
—
V (Volts)
Current
—
A (Amps)
Resistance
—
Ω (Ohms)
Power
—
W (Watts)

Ohm's Law Wheel

V I × R P / I √(P×R) I V / R P / V √(P/R) R V / I V² / P P / I² P V × I I² × R V² / R

Formula Reference

V = I × R
I = V / R
R = V / I
P = V × I
P = I² × R
P = V² / R