CalculatorCamp

Science

Power Unit Converter

Power measures how fast energy is transferred or work is done. Electric devices quote watts and kilowatts, cars and motors may use mechanical horsepower, and HVAC equipment sometimes lists BTU per hour.

Inputs

Enter your values below. Results update when you calculate.

About Power Converter

Power measures how fast energy is transferred or work is done. Electric devices quote watts and kilowatts, cars and motors may use mechanical horsepower, and HVAC equipment sometimes lists BTU per hour.

CalculatorCamp power converter aligns these ratings when comparing generators, workout equipment, or appliance draw.

Remember power is not the same as energy consumption over time—multiply power by hours for energy (e.g., kWh on your bill).

How to use this tool

Enter the power value, choose the source unit, and select the desired unit. Calculate for instant conversion.

Formula & methodology

This power unit converter applies the standard relationship below. Intermediate values are kept at full precision; only the displayed result is rounded.

1 hp (mechanical) = 745.7 W; 1 kW = 1000 W; 1 BTU/h = 0.293071 W

Tips for accurate results

  • Metric horsepower (PS) differs slightly from mechanical hp—confirm which rating you have.
  • Peak versus continuous power ratings on inverters are not interchangeable.
  • Convert nameplate watts before summing circuit loads.
  • Audio amplifier watts may be marketing RMS vs peak; read spec sheets.

Frequently asked questions

How many watts in one horsepower?

Mechanical horsepower is approximately 745.7 watts.

Can kW convert to BTU/h?

Yes. Use this converter with kW as input and BTU/h as output.

Does higher wattage always mean more electricity cost?

Cost depends on power times runtime; higher W draws faster at full load.

Free?

Yes.

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