Automotive Unit Converter - Power, Torque, Speed and More
Automotive Unit Converter
Convert between metric and imperial automotive measurements instantly. Power, torque, speed, pressure, fuel economy, electrical values and more, all in one place.
Select Category
Power Converter
Horsepower, kilowatts and more
1 Horsepower (HP) = 0.74569987 Kilowatts
Results are for reference only. Always verify critical measurements against manufacturer data or a qualified professional.
All Conversions
From 1 Horsepower (HP)
- hpHorsepower (HP)1
- PSMetric HP (PS)1.01387
- kWKilowatts0.74569987
- WWatts745.69987
- BHPBrake Horsepower (BHP)1
Unit Converter FAQs
What is the difference between HP, BHP and PS?
Horsepower (HP) and Brake Horsepower (BHP) are effectively the same unit in modern use, both equal to 745.7 watts. PS (Pferdestärke, metric horsepower) is the European standard and is slightly lower at 735.5 watts. A car rated at 200 PS produces around 197 HP, so the gap is small but worth understanding when comparing manufacturer specs across regions. If you want to go deeper on how these figures are actually measured, this guide to calculating horsepower breaks down the full process.
How do I convert torque from Nm to lb-ft?
Divide Newton-metres by 1.35582 to get pound-feet. For example, 400 Nm divided by 1.35582 equals approximately 295 lb-ft. This converter handles the calculation instantly: just select Torque, enter your Nm value and pick lb-ft as the target.
Why does L/100km convert differently to MPG?
L/100km measures how much fuel is used per distance (lower is better), while MPG measures how far you travel per unit of fuel (higher is better). Converting between them requires dividing into a constant rather than multiplying, so they have an inverse relationship. 6 L/100km works out to roughly 47 MPG (UK) or 39 MPG (US).
What is the difference between US and UK gallons?
A US gallon is 3.785 litres, while a UK (Imperial) gallon is 4.546 litres, about 20% larger. This difference carries through directly to MPG figures. A car achieving 40 MPG on the UK cycle would only show around 33 MPG on the US cycle, which explains why some international comparisons can look inconsistent.
Why would I convert electrical units in an automotive context?
Modern diagnostics and ECU tuning frequently deal with sensor voltages (typically 0 to 5 V), injector resistance (typically 2 to 16 ohms), and current draw from components. The Electrical, Current, and Resistance categories are useful when cross-referencing sensor specs, checking wiring diagrams that use different unit conventions, or interpreting live data from a scan tool.