Horsepower to Watt Converter
Convert Horsepower to Watt — free, instant, accurate. Part of Power converters.
Select Category
Unit Converter
When to use the Horsepower to Watt converter
- Car specifications — comparing horsepower (US/UK) and PS or kW (Europe).
- Electrical appliances — reading wattage to estimate energy consumption.
- Audio equipment — speaker and amplifier ratings.
- Industrial machinery — sizing motors and pumps.
A short history of power units
James Watt defined "horsepower" in 1782 to market his steam engines against draft horses. The SI unit of power, the watt, is named in his honour. One mechanical horsepower is exactly 745.7 W; one metric horsepower (PS, used in European car specs) is 735.5 W — close but not identical.
Common mistakes when converting power
Mechanical vs metric horsepower
A 100 hp engine (mechanical) is 101.4 PS (metric). Always check which standard a quote uses.
Confusing power and energy
A 1500 W kettle uses 1.5 kWh of energy if it runs for an hour, not 1500 kWh.
BTU/h vs BTU
Air conditioner ratings in "BTU" are actually BTU per hour — the rate, not the total energy.
Frequently asked questions
How do I convert Horsepower to Watt?+
Is the Horsepower to Watt converter accurate?+
Can I share or bookmark a specific Horsepower to Watt value?+
Does Converterse work offline?+
Is the Horsepower to Watt converter free?+
You might also convert
Common Conversions(Smart recommendations)
Find more conversion tools and calculators at Converterse.com. Our online unit converter supports length, weight, temperature, volume, land size, speed, and more.
Features
Accurate Conversions
Precise calculations using verified conversion formulas for reliable results every time.
100+ Units
Comprehensive coverage across 14 categories including length, weight, temperature, and more.
Real-time Results
Instant conversions as you type with a clean, intuitive interface that works on all devices.