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Watts to horsepower converter

Convert watts to horsepower, both ways.

Type a power in watts and read the exact mechanical horsepower, or type horsepower to convert back. The result updates live, with kilowatts, metric horsepower and real-device context and a one-click copy.

Your power

W
HP

Edit either box. The formula is HP = W divided by 745.7, and W = HP times 745.7 (mechanical horsepower).

750 W in horsepower
0 HP
1.0058 HP
Share of a standard US 15 A household circuit used41.7%
15 A circuit at 120 V = 1800 W = 2.41 HP (full bar)750
Kilowatts
0.75
Metric HP (PS)
1.02
BTU per hour
2559.1
Power context
a microwave oven

What this means

    Common devices in horsepower

    HP Each bar shows the horsepower equivalent of a common electric device, from a 100 W fan to an 11 kW electric scooter motor. Every height is the wattage divided by 745.7.

    Power milestones

    745.7 W
    1 HP
    The definition of one mechanical horsepower, the rate a draft horse can sustain.
    1000 W
    1.34 HP
    One kilowatt, the metric unit motor specs are written in.
    10,000 W
    13.41 HP
    A powerful electric scooter or a large air compressor.
    250,000 W
    335.3 HP
    A Tesla Model 3 Long Range motor, full sports-sedan territory.

    Common watts to HP values

    WattsHPHP (rounded)Where you see it

    How the conversion works

    Conversion Factor

    1 mechanical horsepower equals 745.7 watts. Multiply watts by 0.001341 to get HP, or divide by 745.7. Electrical HP (746 W) is essentially the same.

    Where This Matters

    Comparing electric motor specs (typically in W or kW) to traditional engine ratings (HP) requires this conversion. Lawnmowers, pumps, blenders, and air compressors often list both.

    Reference Values

    746 W = 1 HP. 1 kW = 1.34 HP. 100 W = 0.13 HP (a small fan). 1500 W = 2.01 HP (microwave). 10 kW = 13.4 HP (electric scooter). 250 kW = 335 HP (Tesla Model 3).

    Common questions

    750 watts is how many HP?

    750 W = 1.006 HP, almost exactly 1 HP.

    Is electric HP the same as mechanical?

    Mechanical HP = 745.7 W. Electrical HP = 746 W. Difference is negligible in practice.

    How many HP is a Tesla Model 3?

    About 335 HP (250 kW) for Long Range Dual Motor. Performance version reaches 450+ HP.

    All conversion runs in your browser. Nothing is uploaded. 1 mechanical horsepower is defined as 550 foot-pounds per second, which is 745.6999 watts, so these results are precise, not approximate. Electrical HP (746 W) and metric HP (735.5 W) differ slightly.