3.15 Amps to Watts

3.15 amps is 378 watts at 120V (DC). The wattage depends on your circuit voltage.

3.15 Amps to Watts at Every Voltage

Voltage	DC	AC (PF 0.85)	AC 3-Phase (PF 0.85)
12V DC, automotive, solar	37.8W	32.13W	55.65W
24V DC, industrial control	75.6W	64.26W	111.3W
100V Japan residential	315W	267.75W	463.76W
120V US residential	378W	321.3W	556.51W
208V US commercial three-phase	655.2W	556.92W	964.61W
220V Legacy international / parts of Asia	693W	589.05W	1,020.26W
230V UK / EU residential	724.5W	615.82W	1,066.64W
240V US residential (dryer, range, HVAC)	756W	642.6W	1,113.02W
277V US commercial lighting	872.55W	741.67W	1,284.61W
400V UK / EU commercial three-phase	1,260W	1,071W	1,855.03W
460V US industrial motor (NEC 430.250 column)	1,449W	1,231.65W	2,133.28W
480V US industrial three-phase	1,512W	1,285.2W	2,226.03W
575V Canadian industrial three-phase	1,811.25W	1,539.56W	2,666.6W

Also Calculate

swap_horiz 378W to amps cable Wire size for 3.15A science Ohm's law: 120V & 3.15A

Other Amperages

1A120W at 120V 2A240W at 120V 3A360W at 120V 5A600W at 120V 7.5A900W at 120V 10A1,200W at 120V 12A1,440W at 120V 15A1,800W at 120V 20A2,400W at 120V 25A3,000W at 120V 30A3,600W at 120V 35A4,200W at 120V 40A4,800W at 120V 45A5,400W at 120V 50A6,000W at 120V 60A7,200W at 120V 70A8,400W at 120V 80A9,600W at 120V 100A12,000W at 120V 125A15,000W at 120V 150A18,000W at 120V 175A21,000W at 120V 200A24,000W at 120V 225A27,000W at 120V 250A30,000W at 120V 300A36,000W at 120V 350A42,000W at 120V 400A48,000W at 120V 500A60,000W at 120V 600A72,000W at 120V

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.