Amps to Watts
Convert current in amps to power in watts for DC and AC circuits. Free, fast and easy to use.
How it works
Power equals current multiplied by voltage. For AC circuits, multiply also by the power factor, and for three-phase systems by √3. For example, 10 A at 230 V with a power factor of 1 is 2,300 W.
Formula
DC: P = I × V AC 1~: P = I × V × PF AC 3~: P = √3 × I × V × PF
Worked examples
- Current (A): 16 · Voltage (V): 230 · Circuit type: AC single-phase · Power factor (cos φ): 1 → Power: 3,680 W
- Current (A): 16 · Voltage (V): 400 · Circuit type: AC three-phase · Power factor (cos φ): 0.9 → Power: 9,976.6127 W
- Current (A): 5 · Voltage (V): 12 · Circuit type: DC → Power: 60 W
Calculations run locally in your browser. Results are for information only — for engineering, electrical or financial decisions, verify the assumptions and applicable standards.
Frequently asked questions
How many watts can a 16 A circuit handle?
At 230 V single-phase: 16 A × 230 V = 3,680 W. Continuous loads should stay somewhat below this.
How many watts is 16 A three-phase?
At 400 V with a power factor of 1: √3 × 16 A × 400 V ≈ 11,085 W, roughly 11 kW.
Related calculators
Conversion table
Voltage (V): 230 · Circuit type: AC single-phase · Power factor (cos φ): 1
| Current (A) | Power |
|---|---|
| 1 | 230 W |
| 2 | 460 W |
| 5 | 1,150 W |
| 6 | 1,380 W |
| 10 | 2,300 W |
| 13 | 2,990 W |
| 16 | 3,680 W |
| 20 | 4,600 W |
| 25 | 5,750 W |
| 32 | 7,360 W |
| 40 | 9,200 W |