Convert Horsepower to Tons of Refrigeration
1 horsepower (hp) equals 0.2120361315 tons of refrigeration (TR).
1 hp = 0.2120361315 TR
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk horsepower to refrigeration ton converter to paste a column from Excel.
How to Convert Horsepower to Ton of Refrigeration
- 1 hp = 0.2120361315 TR
- 1 TR = 4.716177347 hp
- Example: convert 15 hp to TR: 15 hp = 15 × 0.2120361315 TR = 3.180541972 TR
Reference conditions. hp: Mechanical (imperial) horsepower, 550 ft·lbf/s. Metric horsepower (PS) is about 1.4 % smaller.
Formula
TR = hp × 0.2120361314703
or TR = hp ÷ 4.716177347066
Derivation from SI units:
- 1 hp = 550 ft·lbf/s = 745.69987158227 W
- 1 TR = 12 000 BTU/h = 3516.8528420667 W
- 1 hp = 745.6998715823 W ÷ 3516.852842067 W per TR = 0.2120361314703 TR
Both units are defined exactly, so the factor is exact. Horsepower definition: horsepower; Ton of Refrigeration definition: ton of refrigeration.
Worked examples
- A reading of 5 hp converts to 1.060180657 TR.
5 hp × 0.2120361315 = 1.060180657 TR - A value of 150 hp is 31.80541972 TR.
150 hp × 0.2120361315 = 31.80541972 TR
Horsepower to Ton of Refrigeration conversion table
| Horsepower (hp) | Tons of Refrigeration (TR) |
|---|---|
| 0.25 hp | 0.05300903287 TR |
| 0.5 hp | 0.1060180657 TR |
| 1 hp | 0.2120361315 TR |
| 1.5 hp | 0.3180541972 TR |
| 2 hp | 0.4240722629 TR |
| 5 hp | 1.060180657 TR |
| 10 hp | 2.120361315 TR |
| 25 hp | 5.300903287 TR |
| 50 hp | 10.60180657 TR |
| 100 hp | 21.20361315 TR |
| 150 hp | 31.80541972 TR |
| 200 hp | 42.40722629 TR |
| 300 hp | 63.61083944 TR |
| 400 hp | 84.81445259 TR |
| 500 hp | 106.0180657 TR |
| 1000 hp | 212.0361315 TR |
Where it's used
Horsepower are used for car and motorcycle engine power in the US and UK, while tons of refrigeration appear in air-conditioner and chiller capacity in the US and Asia. Both measure power (energy per unit time), so the conversion is a fixed factor.
Horsepower to other power units
| Conversion | 1 hp equals |
|---|---|
| horsepower to watt | 745.6998716 W |
| horsepower to milliwatt | 745699.8716 mW |
| horsepower to kilowatt | 0.7456998716 kW |
| horsepower to megawatt | 0.0007456998716 MW |
| horsepower to metric horsepower | 1.013869665 PS |
| horsepower to BTU per hour | 2544.433578 BTU/h |
| horsepower to refrigeration ton | 0.2120361315 TR |
| horsepower to kilocalorie per hour | 641.186476 kcal/h |
| horsepower to foot-pound per second | 550 ft·lbf/s |
Frequently asked questions
How many tons of refrigeration are in 1 horsepower?
1 hp = 0.2120361315 TR.
How do I convert horsepower to tons of refrigeration?
Multiply the value in hp by 0.2120361315, or divide it by 4.716177347. For example, 15 hp × 0.2120361315 = 3.180541972 TR.
Is the hp to TR 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, "horsepower (550 ft·lbf/s)".
- 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)".
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 Horsepower to Tons of Refrigeration. Retrieved October 17, 2026, from https://scientificconverters.com/power/horsepower-to-tons-of-refrigeration/
IEEE
Scientific Converters, "Convert Horsepower to Tons of Refrigeration," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/power/horsepower-to-tons-of-refrigeration/