| imperial ton of refrigeration | 1 TR (imperial) | 2 TR (imperial) | 3 TR (imperial) | 4 TR (imperial) | 5 TR (imperial) | 6 TR (imperial) | 7 TR (imperial) | 8 TR (imperial) | 9 TR (imperial) | 10 TR (imperial) | 11 TR (imperial) | 12 TR (imperial) | 13 TR (imperial) | 14 TR (imperial) | 15 TR (imperial) | 16 TR (imperial) | 17 TR (imperial) | 18 TR (imperial) | 19 TR (imperial) | 20 TR (imperial) | 21 TR (imperial) | 22 TR (imperial) | 23 TR (imperial) | 24 TR (imperial) | 25 TR (imperial) | 26 TR (imperial) | 27 TR (imperial) | 28 TR (imperial) | 29 TR (imperial) | 30 TR (imperial) | 31 TR (imperial) | 32 TR (imperial) | 33 TR (imperial) | 34 TR (imperial) | 35 TR (imperial) | 36 TR (imperial) | 37 TR (imperial) | 38 TR (imperial) | 39 TR (imperial) | 40 TR (imperial) | 41 TR (imperial) | 42 TR (imperial) | 43 TR (imperial) | 44 TR (imperial) | 45 TR (imperial) | 46 TR (imperial) | 47 TR (imperial) | 48 TR (imperial) | 49 TR (imperial) | 50 TR (imperial) | 51 TR (imperial) | 52 TR (imperial) | 53 TR (imperial) | 54 TR (imperial) | 55 TR (imperial) | 56 TR (imperial) | 57 TR (imperial) | 58 TR (imperial) | 59 TR (imperial) | 60 TR (imperial) | 61 TR (imperial) | 62 TR (imperial) | 63 TR (imperial) | 64 TR (imperial) | 65 TR (imperial) | 66 TR (imperial) | 67 TR (imperial) | 68 TR (imperial) | 69 TR (imperial) | 70 TR (imperial) | 71 TR (imperial) | 72 TR (imperial) | 73 TR (imperial) | 74 TR (imperial) | 75 TR (imperial) | 76 TR (imperial) | 77 TR (imperial) | 78 TR (imperial) | 79 TR (imperial) | 80 TR (imperial) | 81 TR (imperial) | 82 TR (imperial) | 83 TR (imperial) | 84 TR (imperial) | 85 TR (imperial) | 86 TR (imperial) | 87 TR (imperial) | 88 TR (imperial) | 89 TR (imperial) | 90 TR (imperial) | 91 TR (imperial) | 92 TR (imperial) | 93 TR (imperial) | 94 TR (imperial) | 95 TR (imperial) | 96 TR (imperial) | 97 TR (imperial) | 98 TR (imperial) | 99 TR (imperial) | 100 TR (imperial) |
| milliwatt | 3 938 875 mW | 7 877 750 mW | 11 816 625 mW | 15 755 500 mW | 19 694 375 mW | 23 633 250 mW | 27 572 125 mW | 31 511 000 mW | 35 449 875 mW | 39 388 750 mW | 43 327 625 mW | 47 266 500 mW | 51 205 375 mW | 55 144 250 mW | 59 083 125 mW | 63 022 000 mW | 66 960 875 mW | 70 899 750 mW | 74 838 625 mW | 78 777 500 mW | 82 716 375 mW | 86 655 250 mW | 90 594 125 mW | 94 533 000 mW | 98 471 875 mW | 102 410 750 mW | 106 349 625 mW | 110 288 500 mW | 114 227 375 mW | 118 166 250 mW | 122 105 125 mW | 126 044 000 mW | 129 982 875 mW | 133 921 750 mW | 137 860 625 mW | 141 799 500 mW | 145 738 375 mW | 149 677 250 mW | 153 616 125 mW | 157 555 000 mW | 161 493 875 mW | 165 432 750 mW | 169 371 625 mW | 173 310 500 mW | 177 249 375 mW | 181 188 250 mW | 185 127 125 mW | 189 066 000 mW | 193 004 875 mW | 196 943 750 mW | 200 882 625 mW | 204 821 500 mW | 208 760 375 mW | 212 699 250 mW | 216 638 125 mW | 220 577 000 mW | 224 515 875 mW | 228 454 750 mW | 232 393 625 mW | 236 332 500 mW | 240 271 375 mW | 244 210 250 mW | 248 149 125 mW | 252 088 000 mW | 256 026 875 mW | 259 965 750 mW | 263 904 625 mW | 267 843 500 mW | 271 782 375 mW | 275 721 250 mW | 279 660 125 mW | 283 599 000 mW | 287 537 875 mW | 291 476 750 mW | 295 415 625 mW | 299 354 500 mW | 303 293 375 mW | 307 232 250 mW | 311 171 125 mW | 315 110 000 mW | 319 048 875 mW | 322 987 750 mW | 326 926 625 mW | 330 865 500 mW | 334 804 375 mW | 338 743 250 mW | 342 682 125 mW | 346 621 000 mW | 350 559 875 mW | 354 498 750 mW | 358 437 625 mW | 362 376 500 mW | 366 315 375 mW | 370 254 250 mW | 374 193 125 mW | 378 132 000 mW | 382 070 875 mW | 386 009 750 mW | 389 948 625 mW | 393 887 500 mW |
A ton of refrigeration (TR), also called a refrigeration ton (RT), is a unit of power used in some countries (especially in North America) to describe the heat-extraction capacity of refrigeration and air conditioning equipment.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| imperial ton of refrigeration | TR (imperial) | ≡ 2240 lb × iceIT / 24 h: iceIT = 144 °F × 2326 J/kg·°F | ≈ 3.938875×103 W | Imperial/US |
| imperial ton of refrigerations | milliwatts | imperial ton of refrigerations | milliwatts |
|---|---|---|---|
| 1 | ≈ 3938875 | 6 | ≈ 23633250 |
| 2 | ≈ 7877750 | 7 | ≈ 27572125 |
| 3 | ≈ 11816625 | 8 | ≈ 31511000 |
| 4 | ≈ 15755500 | 9 | ≈ 35449875 |
| 5 | ≈ 19694375 | 10 | ≈ 39388750 |
The milliwatt (mW) is equal to one thousandth (10−3) of a watt. A typical laser pointer outputs about five milliwatts of light power, whereas a typical hearing aid for people uses less than one milliwatt. Audio signals and other electronic signal levels are often measured in dBm, referenced to one milliwatt.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| milliwatt | mW | = 10-3 W | = 10-3 W | Metric system SI |
| milliwatts | imperial ton of refrigerations | milliwatts | imperial ton of refrigerations |
|---|---|---|---|
| 1 | ≈ 2.5387959760084E-7 | 6 | ≈ 1.523277585605E-6 |
| 2 | ≈ 5.0775919520168E-7 | 7 | ≈ 1.7771571832059E-6 |
| 3 | ≈ 7.6163879280251E-7 | 8 | ≈ 2.0310367808067E-6 |
| 4 | ≈ 1.0155183904034E-6 | 9 | ≈ 2.2849163784075E-6 |
| 5 | ≈ 1.2693979880042E-6 | 10 | ≈ 2.5387959760084E-6 |
| imperial ton of refrigerations | milliwatts |
|---|---|
| 1 | ≈ 3 938 875 |
| 2.5387959760084 × 10-7 | ≈ 1 |
| Symbol | Definition |
|---|---|
| ≡ | exactly equal |
| ≈ | approximately equal to |
| = | equal to |
| digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |