CalKit

Power Converter

Convert power units.

W
와트 (W) 기준값
1000.0000W

모든 전력 단위 변환

와트 (W)1000.000000 W
킬로와트 (kW)1.000000 kW
메가와트 (MW)0.001000 MW
마력 (hp)1.341022 hp
독일마력 (PS)1.359621 PS
BTU/h3412.154093 BTU/h

Overview

Convert between watts (W), horsepower (HP), kilowatts (kW), BTU/h, and cal/s. Useful for comparing appliance ratings, automotive engine output, and industrial equipment capacity.

Formula

1 HP (mechanical) = 745.7 W
1 HP (electric) = 746 W
1 HP (metric, PS) = 735.499 W
1 kW = 1000 W = 1.34102 HP
1 BTU/h = 0.293071 W
1 W = 3.41214 BTU/h
1 cal/s = 4.184 W

How to Use

  1. 1Enter the power value to convert.
  2. 2Select the source unit (W, HP, kW, etc.).
  3. 3Select the target unit.
  4. 4View the converted result.

Tips

  • ✔For car engines, 1 HP ≈ 746 W ≈ 0.746 kW.
  • ✔Air conditioner cooling capacity is often rated in BTU/h or watts.
  • ✔The metric horsepower (PS) used in Europe and Asia is slightly different from the mechanical HP used in the US/UK.
  • ✔Power (W) multiplied by time (h) gives energy (Wh).

FAQ

Q. What is the relationship between HP and kW?

1 mechanical HP = 745.7 W ≈ 0.746 kW. Conversely, 1 kW ≈ 1.341 HP. The metric horsepower (PS) is slightly smaller at 735.5 W.

Q. What is the difference between HP and PS?

Mechanical HP (British) = 745.7 W, while PS (German Pferdestärke, metric horsepower) = 735.499 W. The difference is about 1.4%.

Q. How do BTU and watts relate for air conditioners?

1 BTU/h ≈ 0.293 W. A 12,000 BTU/h air conditioner has approximately 3,517 W (3.5 kW) of cooling capacity.

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