Power Converter

Convert Watts, Kilowatts, Mechanical Horsepower (hp), and BTU per hour

Amount to Convert

From

Calculation Result

Converted Value

0.001 kW

1 Watt = 0.001 kW

Input Unit

Watt (W)

Target Unit

Kilowatt (kW)

All POWER Unit Equivalents

Equivalent values for 1 W across standard units

Watt1 W

Kilowatt0.001 kW

Horsepower (mechanical)0.001341 hp

BTU per hour3.412142 BTU/h

How this calculator works

Choose from Watts, kW, HP, or BTU/h.

Translate car engine ratings or appliance wattages.

Formula & Mathematics

Power Ratio Equivalence

1 Horsepower (mechanical) = 745.7 Watts; 1 kW = 1.34102 hp

Converts rate of energy transfer over time.

Worked Example

Convert 150 Horsepower to Kilowatts

Car engine power 150 hp.

• 1 hp = 0.7457 kW

• 150 × 0.7457 = 111.85 kW

150 hp = 111.86 kW.

Frequently Asked Questions

James Watt created the unit in the 18th century to compare the output of steam engines with draft horses.

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