At 120V 15 amps = 1800 watts and at 240V = 3600 watts, this amps to watts calculator is used to convert amperes in watt using P = I × V formula.

  • 1 amp to watts at 120V: P = 120V × 3A = 120 watts
  • 1 amp to watts at 240V: P = 240V × 3A = 240 watts
  • 3 amp to watts at 120V: P = 120V × 3A = 360 watts
  • 3 amp to watts at 240V: P = 240V × 3A = 720 watts
  • 5 amp to watts at 120V: P = 120V × 5A = 600 watts
  • 5 amp to watts at 240V: P = 240V × 5A = 1200 watts
  • 10 amp to watts at 120V: P = 120V × 10A = 1200 watts
  • 10 amp to watts at 240V: P = 240V × 10A = 2400 watts

Amps to Watts Calculator

Amps converts to120V Watts240V Watts
1 Amps120 Watts240 Watts
2 Amps240 Watts480 Watts
3 Amps360 Watts720 Watts
4 Amps480 Watts960 Watts
5 Amps600 Watts1200 Watts
6 Amps720 Watts1440 Watts
7 Amps840 Watts1680 Watts
8 Amps960 Watts1920 Watts
9 Amps1080 Watts2160 Watts
10 Amps1200 Watts2400 Watts
11 Amps1320 Watts2640 Watts
12 Amps1440 Watts2880 Watts
13 Amps1560 Watts3120 Watts
14 Amps1680 Watts3360 Watts
15 Amps1800 Watts3600 Watts
16 Amps1920 Watts3840 Watts
17 Amps2040 Watts4080 Watts
18 Amps2160 Watts4320 Watts
19 Amps2280 Watts4560 Watts
20 Amps2400 Watts4800 Watts
21 Amps2520 Watts5040 Watts
22 Amps2640 Watts5280 Watts
23 Amps2760 Watts5520 Watts
24 Amps2880 Watts5760 Watts
25 Amps3000 Watts6000 Watts
26 Amps3120 Watts6240 Watts
27 Amps3240 Watts6480 Watts
28 Amps3360 Watts6720 Watts
29 Amps3480 Watts6960 Watts
30 Amps3600 Watts7200 Watts
31 Amps3720 Watts7440 Watts
32 Amps3840 Watts7680 Watts
33 Amps3960 Watts7920 Watts
34 Amps4080 Watts8160 Watts
35 Amps4200 Watts8400 Watts
36 Amps4320 Watts8640 Watts
37 Amps4440 Watts8880 Watts
38 Amps4560 Watts9120 Watts
39 Amps4680 Watts9360 Watts
40 Amps4800 Watts9600 Watts
41 Amps4920 Watts9840 Watts
42 Amps5040 Watts10080 Watts
43 Amps5160 Watts10320 Watts
44 Amps5280 Watts10560 Watts
45 Amps5400 Watts10800 Watts
46 Amps5520 Watts11040 Watts
47 Amps5640 Watts11280 Watts
48 Amps5760 Watts11520 Watts
49 Amps5880 Watts11760 Watts
50 Amps6000 Watts12000 Watts
51 Amps6120 Watts12240 Watts
52 Amps6240 Watts12480 Watts
53 Amps6360 Watts12720 Watts
54 Amps6480 Watts12960 Watts
55 Amps6600 Watts13200 Watts
56 Amps6720 Watts13440 Watts
57 Amps6840 Watts13680 Watts
58 Amps6960 Watts13920 Watts
59 Amps7080 Watts14160 Watts
60 Amps7200 Watts14400 Watts
61 Amps7320 Watts14640 Watts
62 Amps7440 Watts14880 Watts
63 Amps7560 Watts15120 Watts
64 Amps7680 Watts15360 Watts
65 Amps7800 Watts15600 Watts
66 Amps7920 Watts15840 Watts
67 Amps8040 Watts16080 Watts
68 Amps8160 Watts16320 Watts
69 Amps8280 Watts16560 Watts
70 Amps8400 Watts16800 Watts
71 Amps8520 Watts17040 Watts
72 Amps8640 Watts17280 Watts
73 Amps8760 Watts17520 Watts
74 Amps8880 Watts17760 Watts
75 Amps9000 Watts18000 Watts
76 Amps9120 Watts18240 Watts
77 Amps9240 Watts18480 Watts
78 Amps9360 Watts18720 Watts
79 Amps9480 Watts18960 Watts
80 Amps9600 Watts19200 Watts
81 Amps9720 Watts19440 Watts
82 Amps9840 Watts19680 Watts
83 Amps9960 Watts19920 Watts
84 Amps10080 Watts20160 Watts
85 Amps10200 Watts20400 Watts
86 Amps10320 Watts20640 Watts
87 Amps10440 Watts20880 Watts
88 Amps10560 Watts21120 Watts
89 Amps10680 Watts21360 Watts
90 Amps10800 Watts21600 Watts
91 Amps10920 Watts21840 Watts
92 Amps11040 Watts22080 Watts
93 Amps11160 Watts22320 Watts
94 Amps11280 Watts22560 Watts
95 Amps11400 Watts22800 Watts
96 Amps11520 Watts23040 Watts
97 Amps11640 Watts23280 Watts
98 Amps11760 Watts23520 Watts
99 Amps11880 Watts23760 Watts
100 Amps12000 Watts24000 Watts

Amperes to watts Conversion Table

Current (A)Voltage (V)Power (W)Voltage (V)Power (W)
0.1 amps120 volts12 watts240 volts24 watts
0.2 amps120 volts24 watts240 volts48 watts
0.3 amps120 volts36 watts240 volts72 watts
0.4 amps120 volts48 watts240 volts96 watts
0.5 amps120 volts60 watts240 volts120 watts
0.6 amps120 volts72 watts240 volts144 watts
0.7 amps120 volts84 watts240 volts168 watts
0.8 amps120 volts96 watts240 volts192 watts
0.9 amps120 volts108 watts240 volts216 watts
1 amps120 volts120 watts240 volts240 watts
2 amps120 volts240 watts240 volts480 watts
3 amps120 volts360 watts240 volts720 watts
4 amps120 volts480 watts240 volts960 watts
5 amps120 volts600 watts240 volts1200 watts
6 amps120 volts720 watts240 volts1440 watts
7 amps120 volts840 watts240 volts1680 watts
8 amps120 volts960 watts240 volts1920 watts
9 amps120 volts1080 watts240 volts2160 watts
10 amps120 volts1200 watts240 volts2400 watts

Amps to Watts Conversion Formula

The formula to convert amps to watts is:

P = I × V

Where:

  • P = Power in watts (W)
  • I = Current in amperes (A)
  • V = Voltage in volts (V)

An electric heater draws 10 amps at 120 volts:
P = 10 A × 120 V = 1200 W

This heater consumes 1200 watts or 1.2 kilowatts of power.

How Many Watts are in 1 Amp?

  • In a 12V car battery system: 1 amp × 12 volts = 12 watts
  • In a standard US household circuit (120V): 1 amp × 120 volts = 120 watts
  • In a European household circuit (230V): 1 amp × 230 volts = 230 watts

The number of watts in 1 amp depends on the voltage of the circuit. There’s no fixed conversion rate between amps and watts without knowing the voltage.

How Can I Convert Amps to Watts?

To convert amps to watts, follow these simple steps:

  1. Determine the current (I) in amps
  2. Identify the voltage (V) of the circuit
  3. Multiply the current by the voltage using the formula P = I × V

Let’s convert 5 amps to watts in a 240V circuit:

Current (I) = 5 amps

Voltage (V) = 240 volts

P = I × V = 5 A × 240 V = 1200 W

Therefore, 5 amps in a 240V circuit equals 1200 watts.

What is 40 Amps in Watts?

In a 120V circuit (typical US household): P = I × V = 40 A × 120 V = 4800 W

In a 240V circuit (high-power appliances or industrial settings): P = I × V = 40 A × 240 V = 9600 W

To determine the wattage of a 40-amp current, we need to know the voltage.

A 40-amp, 240V electric vehicle charging station would deliver: 40 A × 240 V = 9600 W or 9.6 kW of power.

What is 20 Watts in Amps?

To convert watts to amps, we use the formula:

I = P ÷ V

For 20 watts, the amperage will vary depending on the voltage:

In a 5V USB charging circuit: I = 20 W ÷ 5 V = 4 A

In a 12V LED lighting circuit: I = 20 W ÷ 12 V ≈ 1.67 A

In a 120V household circuit: I = 20 W ÷ 120 V ≈ 0.17 A

A 20-watt LED bulb operating on a 120V circuit would draw approximately 0.17 amps.

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