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Amps to Watts Converter

Convert amps to watts in one step. Results update live in both directions, with a worked formula, nearby units and a 1–100 chart you can click. Set the voltage, current type and power factor to match your circuit.

AmpsFrom

WattsTo

Decimal places

Current type

Common voltage

Voltage (V)

Power factor (AC)

Step-by-step calculation

How to use the Amps to Watts Converter

Type a value in the Amps box. The watts result appears instantly.
Going the other way? Type in the Watts box, or press the ⇄ swap button.
Set the precision with the decimal places menu and adjust the options to match your situation.
Check the working in the step-by-step box, then press Copy result or click any row in the tables below.

Amps to watts formula

Watts = Amps × Volts (× PF)

Single-phase AC: W = A × V × PF; DC: W = A × V.
Three-phase AC: W = √3 × A × V(line-to-line) × PF.

Example: 10 A × 120 V = 1,200 W (DC or PF 1).

Reverse formula: A = W ÷ (V × PF). Example: 1,500 W ÷ 120 V = 12.5 A.

The power factor only matters for AC loads such as motors and power supplies; resistive heaters and kettles have a PF close to 1.

A to W conversion table (1–100)

Click any row to load it into the converter.

Amps to watts at 120 V AC

Amps	Watts
1 A	120 W
2 A	240 W
3 A	360 W
4 A	480 W
5 A	600 W
6 A	720 W
7 A	840 W
8 A	960 W
9 A	1,080 W
10 A	1,200 W
11 A	1,320 W
12 A	1,440 W
13 A	1,560 W
14 A	1,680 W
15 A	1,800 W
16 A	1,920 W
17 A	2,040 W
18 A	2,160 W
19 A	2,280 W
20 A	2,400 W
21 A	2,520 W
22 A	2,640 W
23 A	2,760 W
24 A	2,880 W
25 A	3,000 W
26 A	3,120 W
27 A	3,240 W
28 A	3,360 W
29 A	3,480 W
30 A	3,600 W
31 A	3,720 W
32 A	3,840 W
33 A	3,960 W
34 A	4,080 W
35 A	4,200 W
36 A	4,320 W
37 A	4,440 W
38 A	4,560 W
39 A	4,680 W
40 A	4,800 W
41 A	4,920 W
42 A	5,040 W
43 A	5,160 W
44 A	5,280 W
45 A	5,400 W
46 A	5,520 W
47 A	5,640 W
48 A	5,760 W
49 A	5,880 W
50 A	6,000 W
51 A	6,120 W
52 A	6,240 W
53 A	6,360 W
54 A	6,480 W
55 A	6,600 W
56 A	6,720 W
57 A	6,840 W
58 A	6,960 W
59 A	7,080 W
60 A	7,200 W
61 A	7,320 W
62 A	7,440 W
63 A	7,560 W
64 A	7,680 W
65 A	7,800 W
66 A	7,920 W
67 A	8,040 W
68 A	8,160 W
69 A	8,280 W
70 A	8,400 W
71 A	8,520 W
72 A	8,640 W
73 A	8,760 W
74 A	8,880 W
75 A	9,000 W
76 A	9,120 W
77 A	9,240 W
78 A	9,360 W
79 A	9,480 W
80 A	9,600 W
81 A	9,720 W
82 A	9,840 W
83 A	9,960 W
84 A	10,080 W
85 A	10,200 W
86 A	10,320 W
87 A	10,440 W
88 A	10,560 W
89 A	10,680 W
90 A	10,800 W
91 A	10,920 W
92 A	11,040 W
93 A	11,160 W
94 A	11,280 W
95 A	11,400 W
96 A	11,520 W
97 A	11,640 W
98 A	11,760 W
99 A	11,880 W
100 A	12,000 W

Watts to amps at 120 V AC

Watts	Amps
1 W	0.008 A
2 W	0.017 A
3 W	0.025 A
4 W	0.033 A
5 W	0.042 A
6 W	0.05 A
7 W	0.058 A
8 W	0.067 A
9 W	0.075 A
10 W	0.083 A
11 W	0.092 A
12 W	0.1 A
13 W	0.108 A
14 W	0.117 A
15 W	0.125 A
16 W	0.133 A
17 W	0.142 A
18 W	0.15 A
19 W	0.158 A
20 W	0.167 A
21 W	0.175 A
22 W	0.183 A
23 W	0.192 A
24 W	0.2 A
25 W	0.208 A
26 W	0.217 A
27 W	0.225 A
28 W	0.233 A
29 W	0.242 A
30 W	0.25 A
31 W	0.258 A
32 W	0.267 A
33 W	0.275 A
34 W	0.283 A
35 W	0.292 A
36 W	0.3 A
37 W	0.308 A
38 W	0.317 A
39 W	0.325 A
40 W	0.333 A
41 W	0.342 A
42 W	0.35 A
43 W	0.358 A
44 W	0.367 A
45 W	0.375 A
46 W	0.383 A
47 W	0.392 A
48 W	0.4 A
49 W	0.408 A
50 W	0.417 A
51 W	0.425 A
52 W	0.433 A
53 W	0.442 A
54 W	0.45 A
55 W	0.458 A
56 W	0.467 A
57 W	0.475 A
58 W	0.483 A
59 W	0.492 A
60 W	0.5 A
61 W	0.508 A
62 W	0.517 A
63 W	0.525 A
64 W	0.533 A
65 W	0.542 A
66 W	0.55 A
67 W	0.558 A
68 W	0.567 A
69 W	0.575 A
70 W	0.583 A
71 W	0.592 A
72 W	0.6 A
73 W	0.608 A
74 W	0.617 A
75 W	0.625 A
76 W	0.633 A
77 W	0.642 A
78 W	0.65 A
79 W	0.658 A
80 W	0.667 A
81 W	0.675 A
82 W	0.683 A
83 W	0.692 A
84 W	0.7 A
85 W	0.708 A
86 W	0.717 A
87 W	0.725 A
88 W	0.733 A
89 W	0.742 A
90 W	0.75 A
91 W	0.758 A
92 W	0.767 A
93 W	0.775 A
94 W	0.783 A
95 W	0.792 A
96 W	0.8 A
97 W	0.808 A
98 W	0.817 A
99 W	0.825 A
100 W	0.833 A

Common values

Amps	Watts	Example
0.5 A	60 W	Phone charger (approx.)
1 A	120 W	1 A
2 A	240 W	2 A
5 A	600 W	5 A
10 A	1,200 W	10 A
12 A	1,440 W	Space heater (120 V)
13 A	1,560 W	UK plug fuse
15 A	1,800 W	15 A circuit
16 A	1,920 W	EU socket circuit
20 A	2,400 W	20 A circuit
30 A	3,600 W	30 A
32 A	3,840 W	EV charger (32 A)
50 A	6,000 W	50 A

About amps and watts

Amps (A). The ampere (amp) is the SI unit of electric current: the flow of electric charge through a circuit.

Watts (W). The watt is the SI unit of power. In an electric circuit, power equals voltage times current (times the power factor for AC).

Frequently asked questions

How do you convert amps to watts?

Multiply amps by volts: W = A × V for DC. For AC multiply by the power factor too (W = A × V × PF), and for three-phase also by √3 (1.732).

How many watts is 15 amps at 120 volts?

15 A × 120 V = 1,800 W. Because continuous loads should stay under 80% of the breaker rating, plan on about 1,440 W on a 15 A household circuit.

How many watts is 13 amps at 230 V?

13 A × 230 V = 2,990 W, about 3 kW, which is the most a UK 13 A plug can supply.

Can I convert amps to watts without the voltage?

No. Watts depend on both current and voltage, so you need the voltage of the circuit. Pick a common voltage above or type your own.

What is 15 amps in watts?

15 A is 1,800 W. This assumes 120 V and a power factor of 1; change the voltage above for other circuits.

Does this converter work offline?

Once the page has loaded, the conversion runs entirely in your browser, so it keeps working without a connection. It is free and needs no sign-up.

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