Convert power and energy flow measurements across different metric, mechanical, and thermal units. Select your units from the dropdowns, or use the Quick Shortcuts to jump directly to standard pairs.
Key Features of Power Calculator
- Watt, Horsepower, BTUs Convert seamlessly across standard electrical and mechanical units.
- Real-Time Calculations Instant conversion grid updates on every keystroke.
Power Calculator Examples
Convert Horsepower to Kilowatts
Convert an engine's output of 150 horsepower to kilowatts.
Input
150 hp to kWOutput
111.85 kWHow to Use Power Calculator
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1. Enter a Value
Type a power value into the input field.
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2. Select Source and Target Units
Choose from Watts (W), Kilowatts (kW), Megawatts (MW), Horsepower (hp), or BTU/hr using the dropdowns.
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3. View the Conversion
The converted result and the exact formula used are displayed.
Common Use Cases for Power Calculator
- Selecting Home Appliances Convert BTU ratings to Watts or Kilowatts to check power loads.
- Automotive Specifications Compare vehicle performance details between horsepower and kW metrics.
- Solar Power Arrays Calculate energy outputs and size converter panels correctly.
The Technical Details
Translates values through a static lookup ratio table locally.
Frequently Asked Questions
How many watts are in a kilowatt?
1 kilowatt (kW) = 1,000 watts (W). A kilowatt-hour (kWh) is the energy consumed by running a 1 kW device for one hour.
What is the difference between mechanical and electrical horsepower?
1 mechanical horsepower = 745.7 W. 1 electrical horsepower = 746 W. The tool uses the mechanical horsepower definition.
What is BTU per hour used for?
BTU/hr (British Thermal Units per hour) is commonly used to measure the power output or capacity of heating and cooling systems such as air conditioners and furnaces.
Is my data sent to a server?
No. All conversions run locally in your browser using client-side JavaScript; nothing is transmitted or stored.