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Watts to BTU Converter

A quick two-way W ⇄ BTU/h converter: type in either box, choose how many decimals you want and copy the answer with one click.

W
BTU/h
 

Step-by-step calculation

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    How to use the Watts to BTU Converter

    1. Type a value in the Watts box. The BTU per hour result appears instantly.
    2. Going the other way? Type in the BTU per hour box, or press the ⇄ swap button.
    3. Set the precision with the decimal places menu.
    4. Check the working in the step-by-step box, then press Copy result or click any row in the tables below.

    Watts to BTU per hour formula

    BTU/h = W × 3.412141633
    1. Take the value in watts.
    2. Multiply it by 3.412141633 (the number of BTU per hour in one watt).

    Example: 1,000 W × 3.412141633 = 3,412.14 BTU/h.

    Reverse formula (BTU per hour to watts): W = BTU/h ÷ 3.412141633. Example: 5,118.21 BTU/h ÷ 3.412141633 = 1,500 W.

    Quick mental estimate: multiply by about 3.4. For exact answers use the converter above.

    W to BTU/h conversion table (1–100)

    Click any row to load it into the converter.

    Watts to BTU per hour

    WattsBTU per hour
    1 W3.41 BTU/h
    2 W6.82 BTU/h
    3 W10.24 BTU/h
    4 W13.65 BTU/h
    5 W17.06 BTU/h
    6 W20.47 BTU/h
    7 W23.88 BTU/h
    8 W27.3 BTU/h
    9 W30.71 BTU/h
    10 W34.12 BTU/h
    11 W37.53 BTU/h
    12 W40.95 BTU/h
    13 W44.36 BTU/h
    14 W47.77 BTU/h
    15 W51.18 BTU/h
    16 W54.59 BTU/h
    17 W58.01 BTU/h
    18 W61.42 BTU/h
    19 W64.83 BTU/h
    20 W68.24 BTU/h
    21 W71.65 BTU/h
    22 W75.07 BTU/h
    23 W78.48 BTU/h
    24 W81.89 BTU/h
    25 W85.3 BTU/h
    26 W88.72 BTU/h
    27 W92.13 BTU/h
    28 W95.54 BTU/h
    29 W98.95 BTU/h
    30 W102.36 BTU/h
    31 W105.78 BTU/h
    32 W109.19 BTU/h
    33 W112.6 BTU/h
    34 W116.01 BTU/h
    35 W119.42 BTU/h
    36 W122.84 BTU/h
    37 W126.25 BTU/h
    38 W129.66 BTU/h
    39 W133.07 BTU/h
    40 W136.49 BTU/h
    41 W139.9 BTU/h
    42 W143.31 BTU/h
    43 W146.72 BTU/h
    44 W150.13 BTU/h
    45 W153.55 BTU/h
    46 W156.96 BTU/h
    47 W160.37 BTU/h
    48 W163.78 BTU/h
    49 W167.19 BTU/h
    50 W170.61 BTU/h
    51 W174.02 BTU/h
    52 W177.43 BTU/h
    53 W180.84 BTU/h
    54 W184.26 BTU/h
    55 W187.67 BTU/h
    56 W191.08 BTU/h
    57 W194.49 BTU/h
    58 W197.9 BTU/h
    59 W201.32 BTU/h
    60 W204.73 BTU/h
    61 W208.14 BTU/h
    62 W211.55 BTU/h
    63 W214.96 BTU/h
    64 W218.38 BTU/h
    65 W221.79 BTU/h
    66 W225.2 BTU/h
    67 W228.61 BTU/h
    68 W232.03 BTU/h
    69 W235.44 BTU/h
    70 W238.85 BTU/h
    71 W242.26 BTU/h
    72 W245.67 BTU/h
    73 W249.09 BTU/h
    74 W252.5 BTU/h
    75 W255.91 BTU/h
    76 W259.32 BTU/h
    77 W262.73 BTU/h
    78 W266.15 BTU/h
    79 W269.56 BTU/h
    80 W272.97 BTU/h
    81 W276.38 BTU/h
    82 W279.8 BTU/h
    83 W283.21 BTU/h
    84 W286.62 BTU/h
    85 W290.03 BTU/h
    86 W293.44 BTU/h
    87 W296.86 BTU/h
    88 W300.27 BTU/h
    89 W303.68 BTU/h
    90 W307.09 BTU/h
    91 W310.5 BTU/h
    92 W313.92 BTU/h
    93 W317.33 BTU/h
    94 W320.74 BTU/h
    95 W324.15 BTU/h
    96 W327.57 BTU/h
    97 W330.98 BTU/h
    98 W334.39 BTU/h
    99 W337.8 BTU/h
    100 W341.21 BTU/h

    BTU per hour to watts

    BTU per hourWatts
    1 BTU/h0.29 W
    2 BTU/h0.59 W
    3 BTU/h0.88 W
    4 BTU/h1.17 W
    5 BTU/h1.47 W
    6 BTU/h1.76 W
    7 BTU/h2.05 W
    8 BTU/h2.34 W
    9 BTU/h2.64 W
    10 BTU/h2.93 W
    11 BTU/h3.22 W
    12 BTU/h3.52 W
    13 BTU/h3.81 W
    14 BTU/h4.1 W
    15 BTU/h4.4 W
    16 BTU/h4.69 W
    17 BTU/h4.98 W
    18 BTU/h5.28 W
    19 BTU/h5.57 W
    20 BTU/h5.86 W
    21 BTU/h6.15 W
    22 BTU/h6.45 W
    23 BTU/h6.74 W
    24 BTU/h7.03 W
    25 BTU/h7.33 W
    26 BTU/h7.62 W
    27 BTU/h7.91 W
    28 BTU/h8.21 W
    29 BTU/h8.5 W
    30 BTU/h8.79 W
    31 BTU/h9.09 W
    32 BTU/h9.38 W
    33 BTU/h9.67 W
    34 BTU/h9.96 W
    35 BTU/h10.26 W
    36 BTU/h10.55 W
    37 BTU/h10.84 W
    38 BTU/h11.14 W
    39 BTU/h11.43 W
    40 BTU/h11.72 W
    41 BTU/h12.02 W
    42 BTU/h12.31 W
    43 BTU/h12.6 W
    44 BTU/h12.9 W
    45 BTU/h13.19 W
    46 BTU/h13.48 W
    47 BTU/h13.77 W
    48 BTU/h14.07 W
    49 BTU/h14.36 W
    50 BTU/h14.65 W
    51 BTU/h14.95 W
    52 BTU/h15.24 W
    53 BTU/h15.53 W
    54 BTU/h15.83 W
    55 BTU/h16.12 W
    56 BTU/h16.41 W
    57 BTU/h16.71 W
    58 BTU/h17 W
    59 BTU/h17.29 W
    60 BTU/h17.58 W
    61 BTU/h17.88 W
    62 BTU/h18.17 W
    63 BTU/h18.46 W
    64 BTU/h18.76 W
    65 BTU/h19.05 W
    66 BTU/h19.34 W
    67 BTU/h19.64 W
    68 BTU/h19.93 W
    69 BTU/h20.22 W
    70 BTU/h20.51 W
    71 BTU/h20.81 W
    72 BTU/h21.1 W
    73 BTU/h21.39 W
    74 BTU/h21.69 W
    75 BTU/h21.98 W
    76 BTU/h22.27 W
    77 BTU/h22.57 W
    78 BTU/h22.86 W
    79 BTU/h23.15 W
    80 BTU/h23.45 W
    81 BTU/h23.74 W
    82 BTU/h24.03 W
    83 BTU/h24.32 W
    84 BTU/h24.62 W
    85 BTU/h24.91 W
    86 BTU/h25.2 W
    87 BTU/h25.5 W
    88 BTU/h25.79 W
    89 BTU/h26.08 W
    90 BTU/h26.38 W
    91 BTU/h26.67 W
    92 BTU/h26.96 W
    93 BTU/h27.26 W
    94 BTU/h27.55 W
    95 BTU/h27.84 W
    96 BTU/h28.13 W
    97 BTU/h28.43 W
    98 BTU/h28.72 W
    99 BTU/h29.01 W
    100 BTU/h29.31 W

    Common values

    WattsBTU per hourExample
    100 W341.21 BTU/h100 W
    500 W1,706.07 BTU/h500 W
    750 W2,559.11 BTU/h750 W
    1,000 W3,412.14 BTU/h1 kW heater
    1,500 W5,118.21 BTU/hSpace heater
    2,000 W6,824.28 BTU/h2 kW
    3,517 W12,000.5 BTU/h1 ton of cooling

    About watts and BTU per hour

    Watts (W). The watt is the SI unit of power: one joule per second.

    BTU per hour (BTU/h). BTU per hour (often just written 'BTU' on air conditioners and heaters) is a power rating. 12,000 BTU/h is one 'ton' of cooling.

    Frequently asked questions

    1 watt equals how many BTU per hour?

    One watt equals 3.41214 BTU per hour.

    How do you convert watts to BTU per hour?

    Multiply the number of watts by 3.412141633. For example, 1,000 W × 3.412141633 = 3,412.14 BTU/h.

    What is 1,500 watts in BTU per hour?

    1,500 W is 5,118.21 BTU/h (space heater).

    How do I convert BTU per hour back to watts?

    Divide by 3.412141633, or press the ⇄ swap button above. For example, 5,118.21 BTU/h ÷ 3.412141633 = 1,500 W.

    What is the difference between BTU and BTU/h?

    BTU is an amount of energy, while BTU per hour is power (energy per hour). Air conditioners are sold by BTU/h, even though the label often just says 'BTU'. 12,000 BTU/h equals one ton of refrigeration (3.517 kW).

    Is this converter free and private?

    Yes. It is free with no sign-up, and every calculation runs in your browser, so nothing you type is sent to a server.

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