21 Kilowatts to Horsepower (metric)

21 kW ≈ 28.552 hp(M)

Calculation: hp(M) = 21 kW × 1.35962 ≈ 28.552 hp(M)

Kilowatt to Horsepower (metric) Converter

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How much power is 21 kW?

21 kW (21,000 W) is comparable to an EV charging station.

What does 21 kW look like?

Comparable to an EV charging station
21 kW (21,000 W) is comparable to an EV charging station.

How to Convert Kilowatt to Horsepower (metric)

1 kilowatt = 1.35962 horsepower (metric)

Horsepower (metric) = Kilowatt × 1.35962

Example: 21 kW × 1.35962 = 28.552 hp(M)

Reverse Conversion

To convert horsepower (metric) back to kilowatts:

  • Remember, 1 horsepower (metric) equals 0.735499 kilowatts.
  • To convert 28.552 hp(M) to kW, multiply 28.552 x 0.735499, resulting in 21 kW.

21 kW is also equal to:

  • 21000 watt
  • 0.021 megawatt
  • 28.15 horsepower (electric)
About these units

Kilowatt: SI multiple equal to one thousand watts.

Horsepower (metric): Metric horsepower based on lifting 75 kgf one meter per second.

Frequently Asked Questions

How much is 21 kilowatts in horsepower (metric)?

21 kilowatts equals 28.552 horsepower (metric). This is calculated by multiplying 21 by the conversion factor 1.35962.

What does 21 kilowatts look like in horsepower (metric)?

21 kilowatts (28.552 horsepower (metric)) is a small commercial system or an EV fast charger.

How do you calculate 21 kilowatts to horsepower (metric)?

Multiply 21 by the conversion factor 1.35962. The calculation is 21 × 1.35962 = 28.552 horsepower (metric). This factor is defined by international measurement standards.

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21 kilowatts = 28.5521 horsepower (metric)
21 kilowatts = 28.5521 horsepower (metric) — conversion chart

For general conversions between kilowatts and horsepower (metric), see the kilowatts to horsepower (metric) converter.

Conversion factors verified against NIST, BIPM, ISO 80000-4 Based on SI base units (W = J/s, BIPM). Last reviewed: April 2026
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.