Calculate Voltage (V), Current (I), Resistance (R), and Power (P) using Ohm's Law. Enter any two values to find the others.
Leave two fields blank — fill any two to solve for the rest.
| Property | Value |
|---|
V = I × R | I = V/R | R = V/I | P = V×I = I²R = V²/R
Australian mains supply: 230V AC, 50Hz (AS/NZS 3000 — "Wiring Rules"). Licensed electricians (A-grade) must perform all fixed electrical wiring in Australia under the Electricity Safety Act.
Cover the unknown: V = I×R | I = V/R | R = V/I. Power triangle: P = V×I = I²×R = V²/R