Convert Tons of Refrigeration to Metric Horsepower
1 ton of refrigeration (TR) equals 4.781589149 metric horsepower (PS).
1 TR = 4.781589149 PS
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk refrigeration ton to metric horsepower converter to paste a column from Excel.
How to Convert Ton of Refrigeration to Metric Horsepower
- 1 TR = 4.781589149 PS
- 1 PS = 0.2091354922 TR
- Example: convert 15 TR to PS: 15 TR = 15 × 4.781589149 PS = 71.72383723 PS
Formula
PS = TR × 4.781589148951
Derivation from SI units:
- 1 TR = 12 000 BTU/h = 3516.8528420667 W
- 1 PS = 75 kgf·m/s = 735.49875 W (exact)
- 1 TR = 3516.852842067 W ÷ 735.49875 W per PS = 4.781589148951 PS
Both units are defined exactly, so the factor is exact. Ton of Refrigeration definition: ton of refrigeration; Metric Horsepower definition: metric horsepower.
Worked examples
- A reading of 2.5 TR converts to 11.95397287 PS.
2.5 TR × 4.781589149 = 11.95397287 PS - A value of 10 TR is 47.81589149 PS.
10 TR × 4.781589149 = 47.81589149 PS
Ton of Refrigeration to Metric Horsepower conversion table
| Tons of Refrigeration (TR) | Metric Horsepower (PS) |
|---|---|
| 0.5 TR | 2.390794574 PS |
| 0.75 TR | 3.586191862 PS |
| 1 TR | 4.781589149 PS |
| 1.5 TR | 7.172383723 PS |
| 2 TR | 9.563178298 PS |
| 2.5 TR | 11.95397287 PS |
| 3 TR | 14.34476745 PS |
| 3.5 TR | 16.73556202 PS |
| 4 TR | 19.1263566 PS |
| 5 TR | 23.90794574 PS |
| 7.5 TR | 35.86191862 PS |
| 10 TR | 47.81589149 PS |
| 20 TR | 95.63178298 PS |
| 50 TR | 239.0794574 PS |
| 100 TR | 478.1589149 PS |
| 500 TR | 2390.794574 PS |
| 1000 TR | 4781.589149 PS |
Where it's used
Tons of Refrigeration are used for air-conditioner and chiller capacity in the US and Asia, while metric horsepower appear in european and Japanese car specifications (PS, CV). Both measure power (energy per unit time), so the conversion is a fixed factor.
Ton of Refrigeration to other power units
| Conversion | 1 TR equals |
|---|---|
| refrigeration ton to watt | 3516.852842 W |
| refrigeration ton to milliwatt | 3516852.842 mW |
| refrigeration ton to kilowatt | 3.516852842 kW |
| refrigeration ton to megawatt | 0.003516852842 MW |
| refrigeration ton to horsepower | 4.716177347 hp |
| refrigeration ton to metric horsepower | 4.781589149 PS |
| refrigeration ton to BTU per hour | 12000 BTU/h |
| refrigeration ton to kilocalorie per hour | 3023.949133 kcal/h |
| refrigeration ton to foot-pound per second | 2593.897541 ft·lbf/s |
Frequently asked questions
How many metric horsepower are in 1 ton of refrigeration?
1 TR = 4.781589149 PS.
How do I convert tons of refrigeration to metric horsepower?
Multiply the value in TR by 4.781589149. For example, 15 TR × 4.781589149 = 71.72383723 PS.
Is the TR to PS conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "ton of refrigeration (12 000 Btu_IT/h)".
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "horsepower (metric)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Tons of Refrigeration to Metric Horsepower. Retrieved October 17, 2026, from https://scientificconverters.com/power/tons-of-refrigeration-to-metric-horsepower/
IEEE
Scientific Converters, "Convert Tons of Refrigeration to Metric Horsepower," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/power/tons-of-refrigeration-to-metric-horsepower/