Skip to main content
    UnitConvertLab logo

    Horsepower-Hour to Watt-Hour Converter

    Convert Horsepower-Hour (hp·h) to Watt-Hour (Wh) instantly. 1 hp·h = 745.699872 Wh.

    Energy Converter

    27 units available

    Decimals:
    745.699872

    1 hp·h = 745.699872 Wh

    Formula:

    Wh = hp·h × 745.6998715833

    With your value: 1 hp·h = 745.69987158 Wh

    How big is that?

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

    Heartbeat (1/2.7e+6 your value)3.73e-7 hp·h
    AA battery charge (1/2.7e+2 your value)0.00373 hp·h
    Slice of bread (1/9.6 your value)0.104 hp·h
    Your value1.00 hp·h
    Daily food intake (3.1× your value)3.13 hp·h
    Litre of petrol (13× your value)12.7 hp·h

    Other Horsepower-Hour to Watt-Hour conversions

    2 hp·h to Wh3 hp·h to Wh4 hp·h to Wh5 hp·h to Wh6 hp·h to Wh7 hp·h to Wh8 hp·h to Wh

    Horsepower-Hour to Watt-Hour Conversion Table

    Horsepower-Hour (hp·h)Watt-Hour (Wh)
    0.5372.849936
    1745.699872
    21,491.399743
    53,728.499358
    107,456.998716
    1511,185.498074
    2014,913.997432
    2518,642.49679
    5037,284.993579
    10074,569.987158
    250186,424.967896
    500372,849.935792
    1000745,699.871583

    Watt-Hour to Horsepower-Hour Conversion Table

    Watt-Hour (Wh)Horsepower-Hour (hp·h)
    0.50.000671
    10.001341
    20.002682
    50.006705
    100.01341
    150.020115
    200.02682
    250.033526
    500.067051
    1000.134102
    2500.335256
    5000.670511
    10001.341022

    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.

    Horsepower-Hour (hp·h)

    Energy

    Exact conversion

    Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

    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

    Watt-Hour (Wh)

    Energy

    Exact conversion

    Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

    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 Horsepower-Hour to Watt-Hour

    To convert from Horsepower-Hour (hp·h) to Watt-Hour (Wh), multiply the value by 745.6998715833.

    Formula: Wh = hp·h × 745.6998715833

    Reverse: hp·h = Wh × 0.0013410221

    Step-by-Step Example

    1. Start with your value in Horsepower-Hour. For example: 5 hp·h
    2. Multiply by the conversion factor: 5 x 745.6998715833
    3. The result is: 3,728.499358 Wh

    About Horsepower-Hour

    The horsepower-hour (hp·h) is a unit of energy and work. One horsepower-hour equals 2.684520 × 10^+6 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

    Common uses: energy calculations, engineering and science, education.

    About Watt-Hour

    The watt-hour (Wh) is a unit of energy and work. One watt-hour equals 3600 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

    Common uses: energy calculations, engineering and science, education.

    Frequently Asked Questions

    How many Watt-Hour are in 1 Horsepower-Hour?

    There are exactly 745.6998715833 Watt-Hour in 1 Horsepower-Hour. This means the conversion factor from Horsepower-Hour to Watt-Hour is 745.6998715833.

    What is the formula to convert Horsepower-Hour to Watt-Hour?

    The formula to convert Horsepower-Hour to Watt-Hour is: Wh = hp·h × 745.6998715833. For example, to convert 10 Horsepower-Hour to Watt-Hour, you would multiply 10 by 745.6998715833.

    What is a Horsepower-Hour?

    The horsepower-hour (hp·h) is a unit of energy and work. One horsepower-hour equals 2.684520 × 10^+6 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

    What is a Watt-Hour?

    The watt-hour (Wh) is a unit of energy and work. One watt-hour equals 3600 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

    What are the common uses of Horsepower-Hour?

    The Horsepower-Hour is commonly used in energy calculations, engineering and science, education.

    Related Energy Conversions

    Joule → Watt-HourKilojoule → Watt-HourMegajoule → Watt-HourGigajoule → Watt-HourMillijoule → Watt-HourCalorie (th) → Watt-HourCalorie (IT) → Watt-HourKilocalorie → Watt-HourBTU (th) → Watt-Hour

    Cite this page

    UnitConvertLab. (2026). Horsepower-Hour to Watt-Hour converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/horsepower_hour-to-watt_hour