What is the Watts to Amps Calculator?
Find the current an appliance draws, or its power from the current. Choose DC, single-phase AC (homes, 220–240 V or 110–120 V) or three-phase AC, enter voltage and power factor (1 for heaters and bulbs, about 0.8–0.9 for motors and ACs). The tool also suggests a breaker size with a 25% safety margin.
How to use the Watts to Amps Calculator
- Choose what you know: watts or amps.
- Select the supply type and voltage.
- Read the result and suggested breaker.
Formulas
- DC: I = P ÷ V
- Single-phase AC: I = P ÷ (V × PF)
- Three-phase AC: I = P ÷ (√3 × V × PF)
This Watts to Amps Calculator is 100% free, needs no signup and runs privately in your browser – on phone, tablet or computer.
Last updated: · By NodifyTech