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Watts to Amps Converter

Enter watts to get amps at your voltage, or enter amps to get watts. Choose DC, single-phase or three-phase AC and set the power factor for motors and appliances.

W
A
 

Step-by-step calculation

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    How to use the Watts to Amps Converter

    1. Type a value in the Watts box. The amps result appears instantly.
    2. Going the other way? Type in the Amps box, or press the ⇄ swap button to flip the direction.
    3. Set the precision with the decimal places menu and adjust the options for your situation.
    4. Copy the result with one click, or click any row in the tables below to load it.

    Watts to amps formula

    Amps = Watts ÷ Volts
    1. DC: divide watts by volts: I = P ÷ V.
    2. AC single-phase: divide watts by volts times power factor: I = P ÷ (V × PF).
    3. AC three-phase: divide watts by √3 times line-to-line volts times power factor: I = P ÷ (1.732 × V × PF).

    Example: a 1,500 W heater on a 120 V outlet draws 1,500 ÷ 120 = 12.5 A. On 230 V it draws 6.52 A.

    Reverse formula (amps to watts): W = A × V (× PF for AC, × 1.732 × PF for three-phase). Example: 10 A × 120 V = 1,200 W.

    Power factor is 1 for heaters, kettles and incandescent bulbs. Motors, compressors and some power supplies are often 0.8–0.95, which means they draw more amps for the same watts.

    W to A conversion table (1–100)

    Click any row to load it into the converter.

    Watts to amps at 120 V AC

    WattsAmps
    1 W0.008 A
    2 W0.017 A
    3 W0.025 A
    4 W0.033 A
    5 W0.042 A
    6 W0.05 A
    7 W0.058 A
    8 W0.067 A
    9 W0.075 A
    10 W0.083 A
    11 W0.092 A
    12 W0.1 A
    13 W0.108 A
    14 W0.117 A
    15 W0.125 A
    16 W0.133 A
    17 W0.142 A
    18 W0.15 A
    19 W0.158 A
    20 W0.167 A
    21 W0.175 A
    22 W0.183 A
    23 W0.192 A
    24 W0.2 A
    25 W0.208 A
    26 W0.217 A
    27 W0.225 A
    28 W0.233 A
    29 W0.242 A
    30 W0.25 A
    31 W0.258 A
    32 W0.267 A
    33 W0.275 A
    34 W0.283 A
    35 W0.292 A
    36 W0.3 A
    37 W0.308 A
    38 W0.317 A
    39 W0.325 A
    40 W0.333 A
    41 W0.342 A
    42 W0.35 A
    43 W0.358 A
    44 W0.367 A
    45 W0.375 A
    46 W0.383 A
    47 W0.392 A
    48 W0.4 A
    49 W0.408 A
    50 W0.417 A
    51 W0.425 A
    52 W0.433 A
    53 W0.442 A
    54 W0.45 A
    55 W0.458 A
    56 W0.467 A
    57 W0.475 A
    58 W0.483 A
    59 W0.492 A
    60 W0.5 A
    61 W0.508 A
    62 W0.517 A
    63 W0.525 A
    64 W0.533 A
    65 W0.542 A
    66 W0.55 A
    67 W0.558 A
    68 W0.567 A
    69 W0.575 A
    70 W0.583 A
    71 W0.592 A
    72 W0.6 A
    73 W0.608 A
    74 W0.617 A
    75 W0.625 A
    76 W0.633 A
    77 W0.642 A
    78 W0.65 A
    79 W0.658 A
    80 W0.667 A
    81 W0.675 A
    82 W0.683 A
    83 W0.692 A
    84 W0.7 A
    85 W0.708 A
    86 W0.717 A
    87 W0.725 A
    88 W0.733 A
    89 W0.742 A
    90 W0.75 A
    91 W0.758 A
    92 W0.767 A
    93 W0.775 A
    94 W0.783 A
    95 W0.792 A
    96 W0.8 A
    97 W0.808 A
    98 W0.817 A
    99 W0.825 A
    100 W0.833 A

    Amps to watts at 120 V AC

    AmpsWatts
    1 A120 W
    2 A240 W
    3 A360 W
    4 A480 W
    5 A600 W
    6 A720 W
    7 A840 W
    8 A960 W
    9 A1,080 W
    10 A1,200 W
    11 A1,320 W
    12 A1,440 W
    13 A1,560 W
    14 A1,680 W
    15 A1,800 W
    16 A1,920 W
    17 A2,040 W
    18 A2,160 W
    19 A2,280 W
    20 A2,400 W
    21 A2,520 W
    22 A2,640 W
    23 A2,760 W
    24 A2,880 W
    25 A3,000 W
    26 A3,120 W
    27 A3,240 W
    28 A3,360 W
    29 A3,480 W
    30 A3,600 W
    31 A3,720 W
    32 A3,840 W
    33 A3,960 W
    34 A4,080 W
    35 A4,200 W
    36 A4,320 W
    37 A4,440 W
    38 A4,560 W
    39 A4,680 W
    40 A4,800 W
    41 A4,920 W
    42 A5,040 W
    43 A5,160 W
    44 A5,280 W
    45 A5,400 W
    46 A5,520 W
    47 A5,640 W
    48 A5,760 W
    49 A5,880 W
    50 A6,000 W
    51 A6,120 W
    52 A6,240 W
    53 A6,360 W
    54 A6,480 W
    55 A6,600 W
    56 A6,720 W
    57 A6,840 W
    58 A6,960 W
    59 A7,080 W
    60 A7,200 W
    61 A7,320 W
    62 A7,440 W
    63 A7,560 W
    64 A7,680 W
    65 A7,800 W
    66 A7,920 W
    67 A8,040 W
    68 A8,160 W
    69 A8,280 W
    70 A8,400 W
    71 A8,520 W
    72 A8,640 W
    73 A8,760 W
    74 A8,880 W
    75 A9,000 W
    76 A9,120 W
    77 A9,240 W
    78 A9,360 W
    79 A9,480 W
    80 A9,600 W
    81 A9,720 W
    82 A9,840 W
    83 A9,960 W
    84 A10,080 W
    85 A10,200 W
    86 A10,320 W
    87 A10,440 W
    88 A10,560 W
    89 A10,680 W
    90 A10,800 W
    91 A10,920 W
    92 A11,040 W
    93 A11,160 W
    94 A11,280 W
    95 A11,400 W
    96 A11,520 W
    97 A11,640 W
    98 A11,760 W
    99 A11,880 W
    100 A12,000 W

    Common values

    WattsAmpsExample
    5 W0.04 APhone charger
    10 W0.08 ALED bulb
    60 W0.5 AOld light bulb
    100 W0.83 ATV / laptop
    300 W2.5 ADesktop PC
    500 W4.17 AGaming PC
    700 W5.83 AMicrowave (low)
    1,000 W8.33 AMicrowave
    1,200 W10 AHair dryer / kettle
    1,500 W12.5 ASpace heater
    1,800 W15 AMax on 15 A circuit
    3,500 W29.17 ACentral AC
    7,200 W60 AEV charger (Level 2)

    Frequently asked questions

    How do you convert watts to amps?

    Divide the watts by the voltage. Amps = Watts ÷ Volts. For example, 1,200 W ÷ 120 V = 10 A. For AC loads with a power factor below 1, divide by volts × power factor.

    How many amps is 1,000 watts?

    1,000 W is 8.33 A at 120 V, 4.35 A at 230 V, 4.17 A at 240 V and 83.3 A at 12 V DC.

    How many amps is 1,500 watts at 120V?

    1,500 W at 120 V is 12.5 A, which fits on a 15 A circuit under the 80% continuous-load rule (12 A is the limit for continuous loads, so 15 A plus margin is safer on a 20 A circuit).

    Can I convert watts to amps without voltage?

    No. Amps depend on voltage, so you need it. In the US, household outlets are 120 V; in most of Europe, the UK and Australia they are 230–240 V.

    What is power factor?

    Power factor (PF) is the ratio of real power (watts) to apparent power (volt-amps) in AC circuits. Resistive loads have PF 1; motors are usually 0.8–0.95.

    How do I convert amps to watts?

    Multiply amps by volts: W = A × V. Click the swap button or type in the Amps box to convert amps to watts.

    Is this watts to amps converter free?

    Yes. It is free, needs no sign-up and runs in your browser. Always check electrical work with a qualified electrician.

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