Power Unit Converter

Power Unit Converter is evaluated from Power Value and From Unit. The calculation reports Watts, Kilowatts and Horsepower.

Results

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About the Power Unit Converter

Power Unit Converter is treated here as a quantitative relation between Power Value and From Unit and Watts, Kilowatts, Horsepower and BTU/hour.

The calculator uses a multi formula configuration. Each reported value is read as a direct evaluation of the stored rules with the declared field formats and units.

Formula basis:
1 hp = 745.7 W (SAE/NEMA US standard)
1 kW = 1,000 W
1 BTU/hr = 0.29307 W
Metric hp (PS) = 735.499 W

Interpret the outputs in the order shown by the result fields. Optional inputs affect only the outputs that depend on those variables.

Formula & How It Works

The calculation applies the following relations exactly as recorded in the metadata:

1 hp = 745.7 W (SAE/NEMA US standard)
1 kW = 1,000 W
1 BTU/hr = 0.29307 W
Metric hp (PS) = 735.499 W

Each output field is produced by substituting the supplied inputs into the relevant relation and then applying the declared rounding or text format.

Worked Examples

Example 1: Ford F-150 Engine: 400 hp

Inputs

value: 400 from_unit: horsepower (hp)
Watts: 298,280 W. Kilowatts: 298.28 kW. Horsepower: 400 hp. BTU/hour: 1,017,777.32 BTU/hr. Megawatts: 0.29828 MW

With Power Value = 400 and From Unit = horsepower (hp) as the stated inputs, the result is Watts = 298,280 W, Kilowatts = 298.28 kW and Horsepower = 400 hp. Each value corresponds to the declared output fields.

Example 2: Central Air Conditioner: 36,000 BTU/hr (3 tons)

Inputs

value: 36000 from_unit: BTU/hour
Watts: 10,550.52 W. Kilowatts: 10.5505 kW. Horsepower: 14.1485 hp. BTU/hour: 36,000 BTU/hr. Megawatts: 0.010551 MW

With Power Value = 36,000 and From Unit = BTU/hour as the stated inputs, the result is Watts = 10,550.52 W, Kilowatts = 10.5505 kW and Horsepower = 14.1485 hp. Each value corresponds to the declared output fields.

Example 3: Wind Turbine: 2.5 MW

Inputs

value: 2.5 from_unit: megawatts (MW)
Watts: 2,500,000 W. Kilowatts: 2,500 kW. Horsepower: 3,352.5546 hp. BTU/hour: 8,530,385.23 BTU/hr. Megawatts: 2.5 MW

With Power Value = 2.5 and From Unit = megawatts (MW) as the stated inputs, the result is Watts = 2,500,000 W, Kilowatts = 2,500 kW and Horsepower = 3,352.5546 hp. Each value corresponds to the declared output fields.

Example 4: Generator: 5 kW

Inputs

value: 5 from_unit: kilowatts (kW)
Watts: 5,000 W. Kilowatts: 5 kW. Horsepower: 6.7051 hp. BTU/hour: 17,060.77 BTU/hr. Megawatts: 0.005 MW

With Power Value = 5 and From Unit = kilowatts (kW) as the stated inputs, the result is Watts = 5,000 W, Kilowatts = 5 kW and Horsepower = 6.7051 hp. Each value corresponds to the declared output fields.

Common Use Cases

  • Convert engine horsepower to kilowatts
  • Convert air conditioner BTU/hr to watts
  • Convert generator output from kW to horsepower