I = P / VNo power factor needed for DC circuits.
Household Appliance Tool
Appliance Watts to Amps Calculator
Calculate the amp draw of any household appliance. Useful for checking if an appliance will overload a circuit, planning outlet placement, or understanding your energy use. Most US appliances run on 120V; large loads like dryers and ranges use 240V.
Conversion direction
Quick voltage presets
Power factor varies by load. Use the equipment value when available.
Calculated result1000 W · 120 V · DC
8.333 A
Formula used
I = P / VCustom voltage is always supported.
Formulas Used
I = P / (V × PF)Single-phase AC — multiply voltage by power factor.
I = P / (√3 × V × PF)Three-phase AC — divide by √3 ≈ 1.732.
Frequently Asked Questions
How many amps does a microwave use?
A typical 1000-1200W microwave at 120V draws 8.3-10A. These should be on a dedicated 20A circuit.
How many amps does a space heater use?
A 1500W space heater at 120V draws 12.5A — close to a full 15A circuit. Always use a dedicated outlet and never use extension cords with space heaters.