42.21 Amps to Watts

42.21 amps is 5,065.2 watts at 120V (DC). The wattage depends on your circuit voltage.

42.21 Amps to Watts at Every Voltage

VoltageDCAC (PF 0.85)AC 3-Phase (PF 0.85)
12V
DC, automotive, solar
506.52W 430.54W 745.72W
24V
DC, industrial control
1,013.04W 861.08W 1,491.44W
100V
Japan residential
4,221W 3,587.85W 6,214.34W
120V
US residential
5,065.2W 4,305.42W 7,457.21W
208V
US commercial three-phase
8,779.68W 7,462.73W 12,925.82W
220V
Legacy international / parts of Asia
9,286.2W 7,893.27W 13,671.54W
230V
UK / EU residential
9,708.3W 8,252.06W 14,292.98W
240V
US residential (dryer, range, HVAC)
10,130.4W 8,610.84W 14,914.41W
277V
US commercial lighting
11,692.17W 9,938.34W 17,213.72W
400V
UK / EU commercial three-phase
16,884W 14,351.4W 24,857.35W
460V
US industrial motor (NEC 430.250 column)
19,416.6W 16,504.11W 28,585.96W
480V
US industrial three-phase
20,260.8W 17,221.68W 29,828.82W
575V
Canadian industrial three-phase
24,270.75W 20,630.14W 35,732.45W

Other Amperages

This calculator provides estimates for reference purposes only. Always consult a licensed electrician and verify compliance with the National Electrical Code (NEC) and local electrical codes before performing any electrical work.