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Ohm's Law Calculator
Solve for voltage, current, resistance, or power — enter any two values
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Enter Any Two Values
Fill in any two fields — the remaining two are calculated automatically.
Enter any two values above to solve for the remaining two.
Formula Reference
V = I × R
I = V / R
R = V / I
P = V × I
P = I² × R
P = V² / R
V = P / I
I = P / V
V = √(P × R)
Ohm's Law Triangle
V
─────
I × R
Power Triangle
P
─────
I × V
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