How to convert watts to amps

To convert watts (electrical power) to amps (electrical current) at a fixed voltage, you can use a variation of Watt's Law formula: Power = Current × Voltage (P = IV). By working backwards, we get the equation: amps = watts ÷ volts, which can be used to convert watts to amps.

How many watts make an amp?

Your conversion depends upon your voltage. At 120 volts, 1 amp is equal to 120 watts. At 240 volts, 1 amp is equal to 240 watts.

How many amps is 1500 watts?

If you have an electrical appliance using 1500 watts of power on a 120v circuit, you can use the equation Current (Amps) = Power (Watts) ÷ Voltage to calculate that the draw of the electrical appliance is 1500 / 120 = 12.5 amps.

Finance
Finance Calculators
Featured Units
Height / Length
Mass (Weight)
Weight / Volume
Volume
Area / Volume
- Square feet to cubic feet
- Square feet to cubic yds
Energy
Force
- Inch-pounds to ft-lb
- Newton-Meters to ft lb
Unit Groups
Unit Converters
- Mass and Weight
- Power
- Pressure
- Temperature
- Time
- Velocity
- Water Weight
- Weight
- Weight to Volume
Handy
Home / Garden
Time
Math
Misc
Cooking
Cooking Calculators
Health
Health Calculators
Articles
Contact Us

Amps to Watts Calculator

Use this calculator to convert amps to watts for both alternating current (AC) and direct current (DC) flows.

Like this? Please share

Disclaimer: Whilst every effort has been made in building our calculator tools, we are not to be held liable for any damages or monetary losses arising out of or in connection with their use. Full disclaimer.

How to convert amps to watts

The formula for converting amps to watts (at a fixed voltage) is watts = amps × volts. To convert amps to watts you multiply your amps figure by the voltage.

watts = amps × volts

Example conversions

15 amps × 120 volts = 1800 watts
20 amps × 120 volts = 2400 watts

Amps to watts at 120V (AC) chart

Amps:	Watts (at 120V):
1 amps	120 watts
2 amps	240 watts
3 amps	360 watts
4 amps	480 watts
5 amps	600 watts
6 amps	720 watts
7 amps	840 watts
8 amps	960 watts
9 amps	1080 watts
10 amps	1200 watts
11 amps	1320 watts
12 amps	1440 watts
13 amps	1560 watts
14 amps	1680 watts
15 amps	1800 watts
16 amps	1920 watts
17 amps	2040 watts
18 amps	2160 watts
19 amps	2280 watts
20 amps	2400 watts
30 amps	3600 watts
40 amps	4800 watts
50 amps	6000 watts
60 amps	7200 watts
70 amps	8400 watts
80 amps	9600 watts
90 amps	10800 watts
100 amps	12000 watts
Note: conversions are a guide only.

Amps to watts at 12V (DC) chart

Amps:	Watts (at 12V):
1 amps	12 watts
2 amps	24 watts
3 amps	36 watts
4 amps	48 watts
5 amps	60 watts
6 amps	72 watts
7 amps	84 watts
8 amps	96 watts
9 amps	108 watts
10 amps	120 watts
11 amps	132 watts
12 amps	144 watts
13 amps	156 watts
14 amps	168 watts
15 amps	180 watts
16 amps	192 watts
17 amps	204 watts
18 amps	216 watts
19 amps	228 watts
20 amps	240 watts
30 amps	360 watts
40 amps	480 watts
50 amps	600 watts
60 amps	720 watts
70 amps	840 watts
80 amps	960 watts
90 amps	1080 watts
100 amps	1200 watts
Note: conversions are a guide only.

How to convert amps to watts manually

The Watt’s Law formula is all that’s needed for these unit conversions. The wattage (power produced / P) is calculated by multiplying the amps (current / I) by the voltage (V):

Power (P) = Current (I) x Voltage (V)

So…

watts = amps × volts

Example: 5 amps are being sent at 120 volts. What’s the wattage?

Power = Current x Voltage
Power = 5A x 120V
Power = 600W

Calculator created by Alastair Hazell

Content reviewed by Derek Bulled, Director of CDS Electrical and an approved electrician with over 30 years of experience.

If you have any problems using this amps and watts converter, please contact me.

Unit articles