21 units · base unit W · M L² T⁻³
Power converter
There is no single horsepower. Mechanical, metric, electric and boiler horsepower all differ, and a car quoted at 200 PS is not quoted at 200 hp. All four are listed separately.
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Show this value in all 21 power units
- Terawatts TW 0.001
- Gigawatts GW 1
- Megawatts MW 1000
- Kilowatts kW 1 000 000
- Watts W 1 000 000 000
- Milliwatts mW 1 000 000 000 000
- Microwatts µW 1 000 000 000 000 000
- Nanowatts nW 1e+18
- Horsepower (mechanical)s hp 1 341 022.0896
- Horsepower (metric)s PS 1 359 621.6173
- Horsepower (electric)s hp (E) 1 340 482.573 73
- Horsepower (boiler)s hp (S) 101 931.042 065
- BTU per hours BTU/h 3 412 141 633.13
- BTU per seconds BTU/s 947 817.120 313
- Ton of refrigerations RT 284 345.136 094
- Calorie per seconds cal/s 239 005 736.138
- Kilocalorie per hours kcal/h 860 420 650.096
- Foot-pound per seconds ft·lbf/s 737 562 149.277
- Erg per seconds erg/s 1e+16
- Volt-amperes VA 1 000 000 000
- Kilovolt-amperes kVA 1 000 000
Every row is Gigawatt (GW) converted through the watt, in exact rational arithmetic.
Common power conversions
- GW → MW
- GW → kW
- GW → W
- GW → hp
- GW → PS
- GW → BTU/h
- GW → RT
- GW → VA
- GW → kVA
- MW → GW
- MW → kW
- MW → W
- MW → hp
- MW → PS
- MW → BTU/h
- MW → RT
- MW → VA
- MW → kVA
- kW → GW
- kW → MW
- kW → W
- kW → hp
- kW → PS
- kW → BTU/h
- kW → RT
- kW → VA
- kW → kVA
- W → GW
- W → MW
- W → kW
- W → hp
- W → PS
- W → BTU/h
- W → RT
- W → VA
- W → kVA
- hp → GW
- hp → MW
- hp → kW
- hp → W
- hp → PS
- hp → BTU/h
- hp → RT
- hp → VA
- hp → kVA
- PS → GW
- PS → MW
- PS → kW
- PS → W
- PS → hp
- PS → BTU/h
- PS → RT
- PS → VA
- PS → kVA
- BTU/h → GW
- BTU/h → MW
- BTU/h → kW
- BTU/h → W
- BTU/h → hp
- BTU/h → PS
All power units
Each unit expressed in watts (W), the unit everything in this category converts through.
| Unit | Symbol | System | Value in W |
|---|---|---|---|
| Terawatt | TW | metric | 1000000000000 |
| Gigawatt | GW | metric | 1000000000 |
| Megawatt | MW | metric | 1000000 |
| Kilowatt | kW | metric | 1000 |
| Watt | W | SI | 1 |
| Milliwatt | mW | metric | 0.001 |
| Microwatt | µW | metric | 0.000001 |
| Nanowatt | nW | metric | 0.000000001 |
| Horsepower (mechanical) | hp | imperial | 745.699871582 |
| Horsepower (metric) | PS | metric | 735.49875 |
| Horsepower (electric) | hp (E) | us | 746 |
| Horsepower (boiler) | hp (S) | us | 9810.55407402 |
| BTU per hour | BTU/h | imperial | 0.293071070172 |
| BTU per second | BTU/s | imperial | 1055.05585262 |
| Ton of refrigeration | RT | us | 3516.85284207 |
| Calorie per second | cal/s | metric | 4.184 |
| Kilocalorie per hour | kcal/h | metric | 1.16222222222 |
| Foot-pound per second | ft·lbf/s | imperial | 1.35581794833 |
| Erg per second | erg/s | cgs | 0.0000001 |
| Volt-ampere | VA | SI | 1 |
| Kilovolt-ampere | kVA | SI | 1000 |
About power units
Convert watts, kilowatts, horsepower (mechanical and metric), BTU/h and tons of refrigeration.
There is no single horsepower. Mechanical, metric, electric and boiler horsepower all differ, and a car quoted at 200 PS is not quoted at 200 hp. All four are listed separately.
Dimensional formula: M L² T⁻³. Every conversion on this page goes through the watt, using exact fractions rather than decimal approximations. Read how that works →