Skip to main content
    UnitConvertLab
    UnitConvertLAB
    Power Conversion

    21 Kilowatt to Horsepower (Elec)

    Quick answer

    21 Kilowatt (kW) equals

    28.150134 hp (E)

    To convert 21 Kilowatts to Horsepower (Elec)s, multiply by 1.3404825737. Therefore, 21 Kilowatt (kW) equals 28.150134 Horsepower (Elec) (hp (E)).

    Formula: hp (E) = kW × 1.3404825737. Calculation: 21 × 1.3404825737 = 28.150134 hp (E).

    Convert Kilowatt (kW) to Horsepower (Elec) (hp (E)) online with our free unit converter. In power, 1 kW = 1.340483 hp (E). Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.

    Worked example: converting Kilowatt to Horsepower (Elec)

    1. Step 1 — start with the formula. hp (E) = kW × 1.3404825737
    2. Step 2 — substitute your figure. 21 kW × 1.3404825737
    3. Step 3 — read the result. 21 kW = 28.150134 hp (E)
    4. Step 4 — check it in reverse. kW = hp (E) × 0.746 returns 21 kW, which matches the figure you started with.

    Power Converter

    22 units available

    Decimals:
    28.150134

    21 kW = 28.150134 hp (E)

    Formula:

    hp (E) = kW × 1.3404825737

    With your value: 21 kW = 28.15013405 hp (E)

    How big is that?

    Everyday references on a logarithmic scale, all expressed in kilowatt so you can sanity-check the result.

    LED bulb (1/2.3e+3 your value)0.00900 kW
    Laptop (1/3.2e+2 your value)0.0650 kW
    Microwave oven (1/21 your value)1.00 kW
    Electric kettle (1/7.0 your value)3.00 kW
    Your value21.0 kW
    Family car engine (4.3× your value)90.0 kW

    Other Kilowatt to Horsepower (Elec) conversions

    15 kW to hp (E)16 kW to hp (E)18 kW to hp (E)20 kW to hp (E)24 kW to hp (E)25 kW to hp (E)26 kW to hp (E)Full Kilowatt to Horsepower (Elec) converter

    Kilowatt to Horsepower (Elec) Conversion Table

    Kilowatt (kW)Horsepower (Elec) (hp (E))
    0.50.670241
    11.340483
    22.680965
    56.702413
    1013.404826
    1520.107239
    2026.809651
    2533.512064
    5067.024129
    100134.048257
    250335.120643
    500670.241287
    10001,340.482574

    Horsepower (Elec) to Kilowatt Conversion Table

    Horsepower (Elec) (hp (E))Kilowatt (kW)
    0.50.373
    10.746
    21.492
    53.73
    107.46
    1511.19
    2014.92
    2518.65
    5037.3
    10074.6
    250186.5
    500373
    1000746

    Where these values come from

    Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

    Kilowatt (kW)

    Power

    Exact conversion

    Derived from the watt (1 W = 1 J/s).

    Source: NIST Special Publication 811, Guide for the Use of the International System of Units

    National Institute of Standards and Technology (US) · Reviewed 2026-07-01

    Horsepower (Elec) (hp (E))

    Power

    Exact conversion

    Derived from the watt (1 W = 1 J/s).

    Source: NIST Special Publication 811, Guide for the Use of the International System of Units

    National Institute of Standards and Technology (US) · Reviewed 2026-07-01

    How to Convert Kilowatt to Horsepower (Elec)

    To convert from Kilowatt (kW) to Horsepower (Elec) (hp (E)), multiply the value by 1.3404825737.

    Formula: hp (E) = kW × 1.3404825737

    Reverse: kW = hp (E) × 0.746

    Step-by-Step Example

    1. Start with your value in Kilowatt. For example: 5 kW
    2. Multiply by the conversion factor: 5 x 1.3404825737
    3. The result is: 6.702413 hp (E)

    Kilowatt and Horsepower (Elec) Relationship

    This calculation facilitates standardized conversion between recognized units of power. Since 1 Kilowatt equals approximately 1.3405 Horsepower (Elec)s, the Kilowatt represents a larger unit interval than the Horsepower (Elec). Understanding the relationship between Kilowatt and Horsepower (Elec) is essential for accurate calculations in physics, engineering, commerce, and daily applications.

    About Kilowatt

    The Kilowatt (symbol: kW) is a recognized unit in the Metric (SI) measurement framework, utilized within power applications for precision and standardized data representation.

    Common uses of Kilowatt: power calculations, engineering and science, education.

    About Horsepower (Elec)

    The Horsepower (Elec) (symbol: hp (E)) is a recognized unit in the Standard measurement framework, utilized within power applications for precision and standardized data representation.

    Common uses of Horsepower (Elec): power calculations, engineering and science, education.

    Frequently Asked Questions

    What is 21 Kilowatt in Horsepower (Elec)?
    21 Kilowatt equals 28.150134 Horsepower (Elec).
    How many Horsepower (Elec)s are in 1 Kilowatt?
    There are exactly 1.3404825737 Horsepower (Elec)s in 1 Kilowatt. This means the conversion factor from Kilowatt to Horsepower (Elec) is 1.3404825737.
    What is the formula to convert Kilowatt to Horsepower (Elec)?
    The formula to convert Kilowatt to Horsepower (Elec) is: hp (E) = kW × 1.3404825737. For example, to convert 10 Kilowatts to Horsepower (Elec)s, you would multiply 10 by 1.3404825737.
    What is a Kilowatt?
    The Kilowatt (symbol: kW) is a recognized unit in the Metric (SI) measurement framework, utilized within power applications for precision and standardized data representation.
    What is a Horsepower (Elec)?
    The Horsepower (Elec) (symbol: hp (E)) is a recognized unit in the Standard measurement framework, utilized within power applications for precision and standardized data representation.
    What are the common uses of Kilowatt?
    The Kilowatt is commonly used in power calculations, engineering and science, education.

    Related Power Conversions

    Watt → Horsepower (Elec)Kilowatt → WattKilowatt → MegawattKilowatt → GigawattKilowatt → MilliwattKilowatt → MicrowattKilowatt → Horsepower (Mech)Kilowatt → Horsepower (Metric)Kilowatt → Horsepower (Boiler)

    Cite this page

    UnitConvertLab. (2026). 21 Kilowatt to Horsepower (Elec). UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/21-kilowatt-to-horsepower_elec