Scientific Power & Heat Flow Rate Converter
Convert between Watts (W), kilowatts (kW), megawatts (MW), mechanical horsepower (HP), metric horsepower (PS/CV), BTU per hour (BTU/hr), and tons of refrigeration (TR).
8 Units Available
| Unit Name | Symbol | Converted Value | Copy |
|---|---|---|---|
| Watt | W | 100 | |
| Kilowatt | kW | 0.1 | |
| Megawatt | MW | 0.0001 | |
| Mechanical Horsepower (HP) | hp | 0.1341 | |
| Metric Horsepower (PS / CV) | PS | 0.136 | |
| BTU per hour | BTU/hr | 341.2142 | |
| Ton of Refrigeration | TR | 0.0284 | |
| Calories per second | cal/s | 23.9006 |
What is Scientific Power & Heat Flow Rate?
Power is the rate at which energy is transferred, converted, or work is performed ($P = dW/dt$), carrying SI dimensions $[M][L]^2[T]^{-3}$ and measured in Watts ($1\,\text{W} = 1\,\text{J/s}$).
Mechanical engineering distinguishes between Imperial mechanical horsepower ($1\,\text{hp} \approx 745.7\,\text{W}$) and European metric horsepower ($1\,\text{PS} \approx 735.5\,\text{W}$), while commercial cooling specifies chillers in tons of refrigeration ($1\,\text{TR} = 12,000\,\text{BTU/hr} \approx 3.517\,\text{kW}$).
Formula & Step-by-Step Calculation
Conversion factors between thermodynamic and mechanical power units.
Worked Step-by-Step Examples
Convert 300 metric horsepower (PS) to kilowatts and mechanical horsepower.
Common Real-World & Academic Use Cases
- ✓ Automotive and marine engine power benchmarking (kW vs mechanical HP vs metric PS)
- ✓ Chiller, heat pump, and air conditioner cooling capacity ratings in tons of refrigeration
- ✓ Electrical generator, wind turbine, and power grid capacity in MW and GW
- ✓ Steam boiler capacity and heat dissipation ratings in BTU/hr
How to Use the Scientific Power & Heat Flow Rate Converter
Input Power
Enter numeric power.
Select Unit
Choose Watts, kW, HP, PS, BTU/hr, or TR.
Read Results
Copy values with 1 click.
Frequently Asked Questions
Q: What is a 'ton of refrigeration'?
One ton of refrigeration (12,000 BTU/hr or 3.517 kW) is the rate of heat extraction required to freeze one short ton (2,000 lbs) of pure water at 0°C into ice in 24 hours.