Convert tons of refrigeration (TR) to kW of cooling and back, with Btu/h and kcal/h. Type in either box.
| TR | kW | Btu/h | kcal/h |
|---|---|---|---|
| 0.5 | 1.758 | 6,000 | 1,512 |
| 0.75 | 2.638 | 9,000 | 2,268 |
| 1 | 3.517 | 12,000 | 3,023.9 |
| 1.5 | 5.275 | 18,000 | 4,535.9 |
| 2 | 7.034 | 24,000 | 6,047.9 |
| 2.5 | 8.792 | 30,000 | 7,559.9 |
| 3 | 10.551 | 36,000 | 9,071.8 |
| 4 | 14.067 | 48,000 | 12,095.8 |
| 5 | 17.584 | 60,000 | 15,119.7 |
| 7.5 | 26.376 | 90,000 | 22,679.6 |
| 10 | 35.169 | 120,000 | 30,239.5 |
| 15 | 52.753 | 180,000 | 45,359.2 |
| 20 | 70.337 | 240,000 | 60,479 |
| 25 | 87.921 | 300,000 | 75,598.7 |
| 30 | 105.51 | 360,000 | 90,718.5 |
| 40 | 140.67 | 480,000 | 120,958 |
| 50 | 175.84 | 600,000 | 151,197.5 |
| 60 | 211.01 | 720,000 | 181,436.9 |
| 75 | 263.76 | 900,000 | 226,796.2 |
| 100 | 351.69 | 1,200,000 | 302,394.9 |
| 150 | 527.53 | 1,800,000 | 453,592.4 |
| 200 | 703.37 | 2,400,000 | 604,789.8 |
| 250 | 879.21 | 3,000,000 | 755,987.3 |
| 300 | 1,055.1 | 3,600,000 | 907,184.7 |
| 400 | 1,406.7 | 4,799,999.9 | 1,209,579.6 |
| 500 | 1,758.4 | 5,999,999.9 | 1,511,974.5 |
| 750 | 2,637.6 | 8,999,999.9 | 2,267,961.8 |
| 1,000 | 3,516.9 | 11,999,999.9 | 3,023,949.1 |
The kW in this converter is cooling capacity. The electricity the unit draws is much lower: electrical kW = cooling kW ÷ COP. A 500 TR (1,758 kW) water-cooled chiller at 0.6 kW/TR draws about 300 kW of electricity, and a 1.5 TR split AC (5.3 kW cooling) with EER 10 draws about 1.8 kW.
| Efficiency | Meaning | Conversion |
|---|---|---|
| kW/TR | Electrical kW per ton of cooling (chillers) | COP = 3.517 ÷ (kW/TR) |
| EER | Btu/h of cooling per watt (unitary AC) | COP = EER ÷ 3.412 |
| COP | Cooling kW per electrical kW | kW/TR = 3.517 ÷ COP |
Related: Chiller Tonnage Calculator, AC Tonnage Calculator, TR to CFM Calculator, kW to BTU Calculator and AC Running Cost Calculator.
1 TR = 3.517 kW of cooling, which is 12,000 Btu/h.
Divide kW by 3.517. For example, 100 kW ÷ 3.517 = 28.4 TR.
It is the cooling effect of melting one short ton (2,000 lb) of ice over 24 hours: 288,000 Btu ÷ 24 h = 12,000 Btu/h.
1.5 TR = 5.28 kW of cooling. Its electrical input is lower, about 1.5–2 kW depending on efficiency.
It is the electrical power drawn per ton of cooling. Lower is better: modern water-cooled chillers reach about 0.5–0.6 kW/TR at full load.
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