Watts to Amps Calculator
Convert real power (Watts) into electrical current (Amps). Essential for sizing circuit breakers, wires, and verifying generator load capacity.
Table of Contents
Power Details
Calculated Current
Calculation
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Common Wattage to Amps Chart
| Power (Watts) | 120V (Amps) | 240V (Amps) | Typical Item |
|---|---|---|---|
| 100 W | 0.83 A | 0.42 A | Light Bulb / Laptop |
| 500 W | 4.17 A | 2.08 A | Small Blender |
| 1,000 W | 8.33 A | 4.17 A | Coffee Maker |
| 1,500 W | 12.50 A | 6.25 A | Space Heater |
| 2,000 W | 16.67 A | 8.33 A | Microwave + Toaster |
| 3,500 W | 29.17 A | 14.58 A | RV AC Unit |
| 5,000 W | 41.67 A | 20.83 A | Electric Water Heater |
| 7,500 W | 62.50 A | 31.25 A | Electric Range |
*Values calculated at Power Factor 1.0 (Resistive Load)
How to Convert Watts to Amps
The conversion from Watts to Amps depends on the type of electrical system (AC vs DC) and the number of phases.
DC Circuits
Batteries, Solar Panels
I = Amps, P = Watts, V = Volts
AC Single-Phase
Standard Outlets (120V/240V)
PF = Power Factor
AC Three-Phase
Industrial/Commercial
√3 ≈ 1.732
Recommended Electrical Essentials
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Live Current Clamp Meters
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Heavy-Duty Outdoor Cords
Don't bottleneck your amps. Ensure safe power delivery with 10-gauge and 12-gauge thick cords.
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Replacement Breakers
Upgrade or replace tripped breakers to match your calculated amperage and safeguard wiring.