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kW to HP Calculator

Convert between kilowatts and horsepower for pump, motor, and generator specs.

Computed in your browser — nothing you enter is uploaded. Figures are presented for United States against IRC 2024, and every formula is cited under regulatory standards below.

Last verified 2026-08-25 · v1.0.0

Market
Imperial · sales tax

Converted power

6.71 HP

High confidence

At the values currently entered, the converted power works out to 6.71 HP. Note that power sits at the low end of the range this calculator was checked against, so treat the output as indicative rather than settled. Figures are shown for United States, where IRC 2024 is the governing residential reference; switch the market above if you are building elsewhere.

Add the equipment this sizes

This result is a specification — 6.705 HP — not a quantity. Put the thing it sizes into your project: how many, what you call it, and your supplier’s price.

Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — confirmed fixes become pinned regression tests.

[Schema Verified] Computed in alignment with American Concrete Institute (ACI 318-19) formulas and International Residential Code (IRC 2024) spatial boundaries.

Regulatory standards & verification citations

  • 1 mechanical horsepower = 0.7457 kilowatts

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Frequently asked questions

Why do pumps and motors mix HP and kW ratings?
HP is the traditional US unit for motor and pump ratings, while kW is standard elsewhere and increasingly common on generator and electrical equipment ratings — you'll often need to convert between them when comparing specs.
Is electrical horsepower the same as mechanical horsepower?
They're very close (735.5 W vs 745.7 W) but not identical — this calculator uses mechanical horsepower, the more commonly cited figure for motors and pumps.
Does this tell me the electrical input power a motor draws?
No — a motor's rated HP/kW is its mechanical output, not its electrical input. Actual electrical draw is higher due to motor efficiency losses (commonly 80-95% efficient) — check the motor's nameplate amps for actual electrical load.