How many Watts are in one horsepower?

One mechanical/imperial horsepower (hp) is equal to approximately 745.7 Watts. Conversely, one metric horsepower (PS) is equal to approximately 735.5 Watts.

What is the difference between energy and power?

Energy represents the total work capacity (measured in Joules or kWh), whereas power represents the rate of doing work per unit of time (measured in Watts or Horsepower). One Watt is defined as one Joule per second.

What is BTU per hour?

BTU per hour (BTU/h) is a unit of power that measures heat transfer rates, commonly used in heating and air conditioning (HVAC) systems. One BTU/h is equal to approximately 0.293 Watts.

Power Converter

Convert units of power instantly: watts, kilowatts, megawatts, horsepower, milliwatts, and BTU/hour online.

Value to Convert From Unit

Converted Value

1.341

To Unit

What is Power? The Rate of Energy Consumption

In physics, power represents the rate at which work is performed or energy is transferred. Mathematically, it is defined as work done divided by time taken (P = W / t). The standard SI unit is the **Watt (W)**, which is equal to one Joule per second.

Whether you are selecting household heaters, evaluating car engines, comparing server rack power draws, or detailing solar panel outputs, using an online **power units converter** provides quick conversions.

Standard Power Units Supported

Our utility converter standardizes multiple scientific metrics, including:

Watt (W) / Kilowatt (kW) / Megawatt (MW): Standard metric units. Wattages define household appliance rates; Megawatts measure grid-level electric generators.
Horsepower (hp): Derived by James Watt to compare steam engine power to horses. Mechanical (Imperial) horsepower is standard in US automotive circles (~745.7 W). Metric horsepower (PS) is standard in Europe (~735.5 W).
BTU per hour (BTU/h): The standard unit used for thermal output in refrigerators and heaters.
Calories per second / kcal per hour: Used in thermal thermodynamics and biological work rate tracking.

To convert raw work capacity limits, explore our Energy Converter. For gas compression bounds, check the Pressure Converter. Or visit our generic Unit Converter.

Coordinate force scales with GoQuickTool. Switch active work metrics on the Energy Converter or audit gas behaviors on the Pressure Converter.