HP to kW

Convert Horsepower to Kilowatts instantly with our Performance Garage engine. Features DIN Metric HP (PS) vs SAE Mechanical HP (BHP) switching, real-world engine matcher, electrical tool breaker estimator, and dynamic SVG tachometer.

Unit Converters
Global Horsepower Standard
Active Standard: DIN 70020 Metric Horsepower (1 PS = 735.499 W). Standard on European vehicle registration documents and Asian vehicle specs.
DIN 70020
PS
DIN 70020 Standard (Europe/Asia)
Equivalent:147.95 BHP(SAE J1349)
Road & Passenger Vehicles150 PS / 110.3 kW
SI Standard
kW
Global SI Scientific Standard
⚡
Real-World Engine & Machine Matcher

Typical 1.5L Turbocharged Engine (e.g. 1.5 EcoBoost / 1.5 TSI)

Mid-Tier Turbo
Quick Automotive & Power Presets
Supply Voltage
Load Characteristics
Running Amperage
564.3A
Est. Motor Startup Surge
1410.7A
Breaker Capacity Reference
16A Residential Rating
Circuit Breaker Tripping Risk⚠️ Tripping Hazard: Exceeds standard 16A/15A residential breaker! Requires a dedicated 20A/32A line or 3-phase supply.

European Automotive Power & Car Tax Reference

Automotive taxation frameworks, registration power units, and high-performance thresholds across European jurisdictions.

JurisdictionOfficial Power UnitTaxation & Fiscal BasisPerformance / Luxury Surcharges
GermanykW (Kilowatt) & PS (DIN)Displacement (cc) + CO2 emissions (g/km) for ICE vehicles; pure EV tax exemption up to 10 years.Insurance type classes (Typklassen) scale heavily above 110 kW (150 PS) and 221 kW (300 PS).
FrancekW & CV (Puissance Fiscale)Puissance Administrative (CV fiscaux): Pa = 1.80×(kW/100)² + 3.87×(kW/100) + 1.34.Regional registration fee per CV fiscal; severe Malus Écologique above specific CO2 & weight ratings.
ItalykW & CV (Cavalli Vapore)Tassa Automobilistica (Bollo Auto) charged per kilowatt (~€2.58 to €3.87/kW depending on Euro class).Superbollo: Surcharge of €20 per kW for every kilowatt exceeding 185 kW (~252 CV).
SpainkW & CV (Caballos Fiscales)IVTM road tax based on Potencia Fiscal (CVF), derived from displacement or kW rating (kW/0.735 × 0.08).Steep tax bracket increases above 16 CVF (~120-140 kW) and 20 CVF (~180 kW).
RomaniakW & CP (Cai Putere)Annual local motor tax graduated per 200 cc increments; 100% electric vehicles are exempt (0 RON).Official RAR vehicle identity card (CIV) registers kW as SI base and CP metric as commercial standard.
PortugalkW & cv (Cavalos-Vapor)IUC (Imposto Único de Circulação) based on cylinder capacity brackets and WLTP CO2 emissions.Electric vehicles 100% exempt from IUC; additional luxury surcharges applied to high-emission vehicles.
US / UK StandardBHP (Brake HP) & kWUS Monroney window stickers list SAE net BHP; UK VED uses CO2 bands and £40k+ luxury car surcharge.Dynamometer SAE J1349 flywheel horsepower reflects gross output before auxiliary accessory parasitic losses.

1. Metric Horsepower (DIN 70020 - European / Automotive):

P(kW) = P(PS) × 0.7355

2. Mechanical / Imperial Horsepower (SAE J1349 - US / UK):

P(kW) = P(hp) × 0.7457
  • 1 PS / Metric HP: = 0.73549875 kW (standard in Continental Europe).
  • 1 hp / Mechanical HP: = 0.74569987 kW (standard in US & UK).

Horsepower to Kilowatt Conversion Table

Horsepower [hp]Kilowatt [kW]
0.01 hp0.007457 kW
0.1 hp0.07457 kW
1 hp0.7457 kW
2 hp1.4914 kW
3 hp2.2371 kW
5 hp3.7285 kW
10 hp7.457 kW
20 hp14.914 kW
50 hp37.285 kW
100 hp74.57 kW
1,000 hp745.7 kW

What is HP to kW?

Convert Horsepower to Kilowatts instantly with our Performance Garage engine. This professional platform eliminates the confusion between global power standards by integrating a strict DIN Metric HP vs SAE Mechanical HP toggle. The dynamic SVG tachometer visually ramps up to reflect the exact power band. For heavy-duty shop planning, the electrical tool breaker estimator evaluates the converted kilowatt load against standard voltage supplies to prevent blown fuses, while the real-world engine matcher compares your numerical output to famous automotive engines for instant scale.
Practical Calculation Example
A custom hot rod builder in Detroit is swapping a modern European crate engine rated at 350 kW into a classic American muscle car. They input the value and select the DIN Metric HP toggle to find the precise equivalent. The real-world engine matcher immediately highlights that the power output perfectly mirrors a modern sports car. To ensure the new high-capacity air compressor for the paint booth won't overload the shop's electrical grid, they punch its horsepower rating into the electrical tool breaker estimator to verify the exact amperage draw on a 240V circuit.
Reference Zones
Interface Element Engineering Function Practical Application
DIN Metric vs SAE Mechanical Power Calibration Shifts the multiplier to account for the slight mathematical difference between European and American horsepower.
Dynamic SVG Tachometer Visual Feedback Provides a real-time dial animation representing the calculated power output.
Real-World Engine Matcher Contextual Scaling Links the raw kW or HP number to a recognizable vehicle engine for better spatial understanding.
Electrical Tool Breaker Estimator Load Calculation Derives the expected amperage draw from the power rating to prevent circuit overloads.

History and Origin

The concept of "horsepower" was famously coined by the Scottish inventor James Watt in the late 18th century. To market his highly efficient steam engines, Watt needed a metric that customers could understand, so he calculated the average power of a draft horse turning a mill wheel. He defined 1 mechanical horsepower as 33,000 foot-pounds of work per minute, a standard that irrevocably shaped the industrial revolution and modern automotive engineering.

What is Horsepower?

Definition & Usage

Horsepower (symbol: hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors.

What is Kilowatt?

Definition & Usage

The kilowatt (symbol: kW) is a unit of power, equal to 1,000 watts. This unit is typically used to express the output power of engines and the power of electric motors, tools, machines, and heaters.

Frequently Asked Questions

How accurate is this HP to kW tool?

Our tools utilize high-precision floating point math guaranteeing accuracy up to the 6th decimal place.

Is this free to use?

Yes, all converters and calculators on ToolsMetrics are 100% free with no limits.

More Frequently Asked Questions