Tasker Electrical
Community reference, not engineering advice. Follow the NEC as adopted locally and the authority having jurisdiction.

Calculator

Ohm’s law

Enter any two of voltage, current and resistance.

By Tasker · updated Oct 15, 2026

0 ▲
Current—
Voltage—
Resistance—
Power (from V and I)—

V = I × R. Results that need a value you left blank show a dash.