Convert Metric Horsepower to Ton of Refrigeration
Convert Metric Horsepower (PS) to Ton of Refrigeration (RT) instantly and accurately.
Conversion Formula
RT = PS × 0.2091354922
About Metric Horsepower
The metric horsepower (PS/CV/pk) equals exactly 75 kgf·m/s = 735.49875 W - the European equivalent of mechanical horsepower, defined as lifting 75 kg by 1 m/s. It was the DIN 66036 standard for European automotive ratings until the EU mandated kW. A 100 PS car produces 73.55 kW; 200 PS = 147.1 kW. The ~1.4% difference from mechanical hp (745.7 W) means a 100 PS car rates as 98.6 mechanical hp. German car advertising still shows PS parenthetically alongside kW. 1 PS = 735.49875 W.
About Ton of Refrigeration
One ton of refrigeration (RT) = 12,000 BTU/h ≈ 3,517 W - the cooling rate to freeze 1 short ton (2,000 lb) of water in 24 hours. This follows from water's latent heat: 144 BTU/lb × 2,000 lb ÷ 24 h = 12,000 BTU/h. US residential AC is 1.5-5 tons; a large commercial building 500-2,000 tons; a hyperscale data centre 50,000-100,000 tons. The RT is deeply embedded in North American HVAC catalogs, load calculation software, and contractor pricing. 1 RT = 3,516.85 W.
Quick Reference Table
| Metric Horsepower (PS) | Ton of Refrigeration (RT) |
|---|---|
| 1 PS | 0.209135 RT |
| 2 PS | 0.418271 RT |
| 5 PS | 1.04568 RT |
| 10 PS | 2.09135 RT |
| 25 PS | 5.22839 RT |
| 50 PS | 10.4568 RT |
| 100 PS | 20.9135 RT |