Rex says
Everyday utility math — the kind you'd otherwise pull up four browser tabs for. I keep it to one clean answer.
Try a scenario
Click to load — tweak from there.Inputs
Result
Kilowatts (kW)
223.7100
Same number read as kilowatts → horsepower
402.3066
1 hp in kW
0.745700
1 kW in hp
1.341022
10× your value in kW
2237.100
Psst — share this and help Rex grow
One click, a permanent link with your numbers baked in.
How to use this
- 1Enter value in horsepower (hp).
- 2Read your kilowatts (kw) on the right — it updates as you type.
- 3Hit Share to keep the scenario or send it to someone.
About this calculator
Mechanical horsepower; metric PS is slightly smaller at 0.7355 kW. Enter a value in horsepower and this converter returns kilowatts along with the reverse direction, so you can sanity-check either way without re-typing.
Worked example
Using the values the calculator loads with:
Inputs
- Value in horsepower: 300 hp
Results
- Kilowatts (kW): 223.71
- Same number read as kilowatts → horsepower: 402.3066
- 1 hp in kW: 0.7457
- 1 kW in hp: 1.341022
- 10× your value in kW: 2,237.1
What each field means
Inputs
- Value in horsepower (hp)
- The value in horsepower used in the calculation, measured in hp. Starts at 300 hp so you have a working example on load.
Results
- Kilowatts (kW)
- Returned as a decimal number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Same number read as kilowatts → horsepower
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- 1 hp in kW
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- 1 kW in hp
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- 10× your value in kW
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the horsepower to kilowatts converter work?
Mechanical horsepower; metric PS is slightly smaller at 0.7355 kW. Enter a value in horsepower and this converter returns kilowatts along with the reverse direction, so you can sanity-check either way without re-typing. The underlying maths is: Kilowatts = Horsepower × 0.745699872
What do I need to enter?
Just one value: value in horsepower. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the kilowatts (kw) result mean?
It is returned as a decimal number and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Estimates assume standard, average conditions — local rules, pricing, and materials vary.
Who is this tool for?
It's built for anyone doing everyday planning maths — a quick estimate that would otherwise need four browser tabs and a calculator app.
Accuracy and limitations
- Estimates assume standard, average conditions — local rules, pricing, and materials vary.
- Results are rounded for readability; add a buffer before ordering, booking, or committing.
- Double-check anything with a real cost attached against a local quote.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Horsepower to Kilowatts Converter. Retrieved from https://www.revenuelab.fyi/toolbox/hp-to-kw
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/hp-to-kw" target="_blank" rel="noopener">Horsepower to Kilowatts Converter — RevenueLab</a> (2026).</p>
Source: [Horsepower to Kilowatts Converter — RevenueLab](https://www.revenuelab.fyi/toolbox/hp-to-kw) (2026).