Ton of Refrigeration (TR)
The ton of refrigeration (TR) is 12 000 BTU/h, about 3.517 kW: the cooling from melting one short ton of ice in 24 hours.
Symbol: TR
Quantity: power (energy per unit time)
SI relation: 1 TR = 3516.852842067 W (exact)
Derivation: 1 TR = 12 000 BTU/h = 3516.8528420667 W
Exact: yes, by definition
Typical uses
- Air-conditioner and chiller capacity in the US and Asia
- Sizing HVAC systems (≈ 400 CFM per ton)
- Not a unit of mass
Convert tons of refrigeration to other units
| Conversion | 1 TR equals | Reverse |
|---|---|---|
| refrigeration ton to watt | 3516.852842 W | watt to refrigeration ton |
| refrigeration ton to kilowatt | 3.516852842 kW | kilowatt to refrigeration ton |
| refrigeration ton to horsepower | 4.716177347 hp | horsepower to refrigeration ton |
| refrigeration ton to BTU per hour | 12000 BTU/h | BTU per hour to refrigeration ton |
| refrigeration ton to megawatt | 0.003516852842 MW | megawatt to refrigeration ton |
| refrigeration ton to metric horsepower | 4.781589149 PS | metric horsepower to refrigeration ton |
| refrigeration ton to milliwatt | 3516852.842 mW | milliwatt to refrigeration ton |
| refrigeration ton to kilocalorie per hour | 3023.949133 kcal/h | kilocalorie per hour to refrigeration ton |
| refrigeration ton to foot-pound per second | 2593.897541 ft·lbf/s | foot-pound per second to refrigeration ton |
Open the Power Converter to convert any value between all units.
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)".
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). Ton of Refrigeration (TR). Retrieved October 17, 2026, from https://scientificconverters.com/units/ton-of-refrigeration/
IEEE
Scientific Converters, "Ton of Refrigeration (TR)," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/units/ton-of-refrigeration/