kW to HP Converter

Convert power between kW and mechanical horsepower using the standard 550 ft·lbf/s horsepower definition.

Kilowatts (kW)

Mechanical horsepower (hp)

—1 kW = 1.341022 hp

kW to HP Converter: Mechanical, Metric & Batch

Convert kW to mechanical, metric or electrical horsepower with exact factors, optional efficiency context, batch values and reverse checks.

Horsepower standard

Efficiency context (%)

Batch kW

Use the tool above, then refresh this verification workspace.

Core conversion workflows

Start with a broad dimension converter or jump to the most common metric/imperial pairs. Specialist converters remain available from the full hub.

All 134 converters

Unit ConverterAll-in-one measurement conversion Length ConverterMetric and imperial length units Weight ConverterMass and weight units Temperature ConverterCelsius, Fahrenheit and Kelvin Inches → CMExact 2.54 conversion CM → InchesReverse exact length conversion KG → LBSKilograms to pounds LBS → KGPounds to kilograms °F → °CFahrenheit to Celsius °C → °FCelsius to Fahrenheit Miles → KMMiles to kilometers KM → MilesKilometers to miles

Practical guide and verification

Choose the horsepower definition explicitly

Mechanical, metric and electrical horsepower use slightly different watt definitions. The same kW value therefore produces different hp results, so record the selected standard when the number is used in a specification or comparison.

Do not apply efficiency twice

A power-conversion efficiency factor changes the relationship between input and useful output power. If the source kW value is already a measured output, applying another efficiency factor can understate the result.

Use reverse conversion as a quick audit

Convert kW to the chosen hp standard and then convert that hp value back to kW. The round-trip should return the starting value apart from display rounding.

Keep power separate from torque

Horsepower and kilowatts measure power, not torque. Engine or motor torque also depends on rotational speed, so a power conversion alone cannot determine shaft torque without RPM.

Match displayed precision to the source

The conversion factors are well defined, but a rounded nameplate or estimated input value does not become more accurate after conversion. Avoid reporting more meaningful digits than the original measurement supports.