Engineering
Ohm's Law Calculator
Calculate voltage, current, resistance, and power from any two values.
⚡
Ohm's Law Calculator
V
Enter any 2 of the 4 values
A
Ω
W
Results
Formula & Methodology
Ohm's Law: V = I × R
Power Formulas:
P = V × I
P = I² × R
P = V² / R
Derived:
I = V / R
R = V / I
Enter any 2 values — the other 2 are calculated automatically.
Power Formulas:
P = V × I
P = I² × R
P = V² / R
Derived:
I = V / R
R = V / I
Enter any 2 values — the other 2 are calculated automatically.
About Ohm's Law Calculator
Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across those two points. It's fundamental to electrical engineering and electronics.
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