21.7 Amps to Watts

21.7 amps is 2,604 watts at 120V (DC). The wattage depends on your circuit voltage.

21.7 Amps to Watts at Every Voltage

VoltageDCAC (PF 0.85)AC 3-Phase (PF 0.85)
12V
DC, automotive, solar
260.4W 221.34W 383.37W
24V
DC, industrial control
520.8W 442.68W 766.74W
100V
Japan residential
2,170W 1,844.5W 3,194.77W
120V
US residential
2,604W 2,213.4W 3,833.72W
208V
US commercial three-phase
4,513.6W 3,836.56W 6,645.12W
220V
Legacy international / parts of Asia
4,774W 4,057.9W 7,028.49W
230V
UK / EU residential
4,991W 4,242.35W 7,347.97W
240V
US residential (dryer, range, HVAC)
5,208W 4,426.8W 7,667.44W
277V
US commercial lighting
6,010.9W 5,109.26W 8,849.51W
400V
UK / EU commercial three-phase
8,680W 7,378W 12,779.07W
460V
US industrial motor (NEC 430.250 column)
9,982W 8,484.7W 14,695.93W
480V
US industrial three-phase
10,416W 8,853.6W 15,334.89W
575V
Canadian industrial three-phase
12,477.5W 10,605.88W 18,369.91W

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.