Electrical Current Benchmark
20 Amps to Watts Calculator
Kitchen small appliance circuits, bathroom receptacles, garage workshop tools. Learn exact wattage at 12V, 120V, 240V, and 480V with NEC 80% continuous safety rules.
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20 Amps Calculation Setup
Volts
PF
Real Power Output
2400 W
2.4 kW
NEC 80% Safe Continuous Load
1920 W
Min Copper Wire (75°C)
12 AWG
Step-by-Step Derivation:
P = 20 A × 120 V × 1.0 = 2400 Watts
Quick Benchmark Summary for 20 Amps
| At 12V DC: | 240 Watts |
| At 24V DC: | 480 Watts |
| At 120V AC (US Wall Receptacle): | 2400 Watts |
| At 240V AC (Appliance/EV): | 4800 Watts |
| Recommended Breaker Size: | 20A |