Power Converter – Convert Watts, Horsepower & BTU/h

This power unit converter routes every input through exact definitions — 1 hp = 745.6999 W and 1 kW = 3412.14245 BTU/h exactly. Enter a value, pick the source and target units, and the result appears instantly with the factor applied shown beside it. Watts and kilowatts meter electrical power worldwide, horsepower still sells cars and lawnmowers, and BTU per hour rates heating and cooling — engines, appliances and HVAC meet at this junction. One mechanical horsepower is exactly 745.6998716 W, so car-to-kilowatt comparisons are definition conversions, and 1 kW = 3412.14245 BTU/h closes the HVAC loop. A mini table of the head factor makes spot-checks immediate: 1 hp = 745.6999 W; 5 hp = 3,728 W; 10 hp = 7,457 W; 50 hp = 37,285 W; 100 hp = 74,570 W. For feel: a strong kettle draws about 3000 W (≈ 4 hp), a family car peaks near 150 kW (≈ 200 hp), and 9000 BTU/h of cooling is roughly 2.6 kW.

1. 1

   Step 1

   Enter the value you want to convert

2. 2

   Step 2

   Select the source unit you are converting from

3. 3

   Step 3

   Select the target unit you want as the result

4. 4

   Step 4

   Read the exact result, then swap or copy as needed

• 1

  Car anchor: 100 kW ≈ 134 hp; 200 hp ≈ 149 kW

• 2

  kW × 3412.14245 = BTU/h for AC and heater quotes

• 3

  PS (German spec sheets) = 0.986 hp — nearly equal but not exact

• 4

  Electric motors quote kW: multiply by 1.34 for US hp comparisons

• Using metric hp (735.49875 W) where mechanical hp (745.6998716 W) applies — a 1.4% drift

• Reading boiler "input BTU" as output capacity without efficiency losses

• Quoting PS and hp as if identical on translated spec sheets