21.25 Amps to Watts

21.25 amps is 2,550 watts at 120V (DC). The wattage depends on your circuit voltage.

21.25 Amps to Watts at Every Voltage

VoltageDCAC (PF 0.85)AC 3-Phase (PF 0.85)
12V
DC, automotive, solar
255W 216.75W 375.42W
24V
DC, industrial control
510W 433.5W 750.84W
100V
Japan residential
2,125W 1,806.25W 3,128.52W
120V
US residential
2,550W 2,167.5W 3,754.22W
208V
US commercial three-phase
4,420W 3,757W 6,507.31W
220V
Legacy international / parts of Asia
4,675W 3,973.75W 6,882.74W
230V
UK / EU residential
4,887.5W 4,154.38W 7,195.59W
240V
US residential (dryer, range, HVAC)
5,100W 4,335W 7,508.44W
277V
US commercial lighting
5,886.25W 5,003.31W 8,665.99W
400V
UK / EU commercial three-phase
8,500W 7,225W 12,514.07W
460V
US industrial motor (NEC 430.250 column)
9,775W 8,308.75W 14,391.18W
480V
US industrial three-phase
10,200W 8,670W 15,016.88W
575V
Canadian industrial three-phase
12,218.75W 10,385.94W 17,988.97W

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.