| femtowatt | 1 fW | 2 fW | 3 fW | 4 fW | 5 fW | 6 fW | 7 fW | 8 fW | 9 fW | 10 fW | 11 fW | 12 fW | 13 fW | 14 fW | 15 fW | 16 fW | 17 fW | 18 fW | 19 fW | 20 fW | 21 fW | 22 fW | 23 fW | 24 fW | 25 fW | 26 fW | 27 fW | 28 fW | 29 fW | 30 fW | 31 fW | 32 fW | 33 fW | 34 fW | 35 fW | 36 fW | 37 fW | 38 fW | 39 fW | 40 fW | 41 fW | 42 fW | 43 fW | 44 fW | 45 fW | 46 fW | 47 fW | 48 fW | 49 fW | 50 fW | 51 fW | 52 fW | 53 fW | 54 fW | 55 fW | 56 fW | 57 fW | 58 fW | 59 fW | 60 fW | 61 fW | 62 fW | 63 fW | 64 fW | 65 fW | 66 fW | 67 fW | 68 fW | 69 fW | 70 fW | 71 fW | 72 fW | 73 fW | 74 fW | 75 fW | 76 fW | 77 fW | 78 fW | 79 fW | 80 fW | 81 fW | 82 fW | 83 fW | 84 fW | 85 fW | 86 fW | 87 fW | 88 fW | 89 fW | 90 fW | 91 fW | 92 fW | 93 fW | 94 fW | 95 fW | 96 fW | 97 fW | 98 fW | 99 fW | 100 fW |
| imperial ton of refrigeration | 2.5387959760084 × 10-19 TR (imperial) | 5.0775919520168 × 10-19 TR (imperial) | 7.6163879280251 × 10-19 TR (imperial) | 1.0155183904034 × 10-18 TR (imperial) | 1.2693979880042 × 10-18 TR (imperial) | 1.523277585605 × 10-18 TR (imperial) | 1.7771571832059 × 10-18 TR (imperial) | 2.0310367808067 × 10-18 TR (imperial) | 2.2849163784075 × 10-18 TR (imperial) | 2.5387959760084 × 10-18 TR (imperial) | 2.7926755736092 × 10-18 TR (imperial) | 3.0465551712101 × 10-18 TR (imperial) | 3.3004347688109 × 10-18 TR (imperial) | 3.5543143664117 × 10-18 TR (imperial) | 3.8081939640126 × 10-18 TR (imperial) | 4.0620735616134 × 10-18 TR (imperial) | 4.3159531592142 × 10-18 TR (imperial) | 4.5698327568151 × 10-18 TR (imperial) | 4.8237123544159 × 10-18 TR (imperial) | 5.0775919520168 × 10-18 TR (imperial) | 5.3314715496176 × 10-18 TR (imperial) | 5.5853511472184 × 10-18 TR (imperial) | 5.8392307448193 × 10-18 TR (imperial) | 6.0931103424201 × 10-18 TR (imperial) | 6.3469899400209 × 10-18 TR (imperial) | 6.6008695376218 × 10-18 TR (imperial) | 6.8547491352226 × 10-18 TR (imperial) | 7.1086287328235 × 10-18 TR (imperial) | 7.3625083304243 × 10-18 TR (imperial) | 7.6163879280251 × 10-18 TR (imperial) | 7.870267525626 × 10-18 TR (imperial) | 8.1241471232268 × 10-18 TR (imperial) | 8.3780267208276 × 10-18 TR (imperial) | 8.6319063184285 × 10-18 TR (imperial) | 8.8857859160293 × 10-18 TR (imperial) | 9.1396655136302 × 10-18 TR (imperial) | 9.393545111231 × 10-18 TR (imperial) | 9.6474247088318 × 10-18 TR (imperial) | 9.9013043064327 × 10-18 TR (imperial) | 1.0155183904034 × 10-17 TR (imperial) | 1.0409063501634 × 10-17 TR (imperial) | 1.0662943099235 × 10-17 TR (imperial) | 1.0916822696836 × 10-17 TR (imperial) | 1.1170702294437 × 10-17 TR (imperial) | 1.1424581892038 × 10-17 TR (imperial) | 1.1678461489639 × 10-17 TR (imperial) | 1.1932341087239 × 10-17 TR (imperial) | 1.218622068484 × 10-17 TR (imperial) | 1.2440100282441 × 10-17 TR (imperial) | 1.2693979880042 × 10-17 TR (imperial) | 1.2947859477643 × 10-17 TR (imperial) | 1.3201739075244 × 10-17 TR (imperial) | 1.3455618672844 × 10-17 TR (imperial) | 1.3709498270445 × 10-17 TR (imperial) | 1.3963377868046 × 10-17 TR (imperial) | 1.4217257465647 × 10-17 TR (imperial) | 1.4471137063248 × 10-17 TR (imperial) | 1.4725016660849 × 10-17 TR (imperial) | 1.4978896258449 × 10-17 TR (imperial) | 1.523277585605 × 10-17 TR (imperial) | 1.5486655453651 × 10-17 TR (imperial) | 1.5740535051252 × 10-17 TR (imperial) | 1.5994414648853 × 10-17 TR (imperial) | 1.6248294246454 × 10-17 TR (imperial) | 1.6502173844054 × 10-17 TR (imperial) | 1.6756053441655 × 10-17 TR (imperial) | 1.7009933039256 × 10-17 TR (imperial) | 1.7263812636857 × 10-17 TR (imperial) | 1.7517692234458 × 10-17 TR (imperial) | 1.7771571832059 × 10-17 TR (imperial) | 1.8025451429659 × 10-17 TR (imperial) | 1.827933102726 × 10-17 TR (imperial) | 1.8533210624861 × 10-17 TR (imperial) | 1.8787090222462 × 10-17 TR (imperial) | 1.9040969820063 × 10-17 TR (imperial) | 1.9294849417664 × 10-17 TR (imperial) | 1.9548729015265 × 10-17 TR (imperial) | 1.9802608612865 × 10-17 TR (imperial) | 2.0056488210466 × 10-17 TR (imperial) | 2.0310367808067 × 10-17 TR (imperial) | 2.0564247405668 × 10-17 TR (imperial) | 2.0818127003269 × 10-17 TR (imperial) | 2.107200660087 × 10-17 TR (imperial) | 2.132588619847 × 10-17 TR (imperial) | 2.1579765796071 × 10-17 TR (imperial) | 2.1833645393672 × 10-17 TR (imperial) | 2.2087524991273 × 10-17 TR (imperial) | 2.2341404588874 × 10-17 TR (imperial) | 2.2595284186475 × 10-17 TR (imperial) | 2.2849163784075 × 10-17 TR (imperial) | 2.3103043381676 × 10-17 TR (imperial) | 2.3356922979277 × 10-17 TR (imperial) | 2.3610802576878 × 10-17 TR (imperial) | 2.3864682174479 × 10-17 TR (imperial) | 2.411856177208 × 10-17 TR (imperial) | 2.437244136968 × 10-17 TR (imperial) | 2.4626320967281 × 10-17 TR (imperial) | 2.4880200564882 × 10-17 TR (imperial) | 2.5134080162483 × 10-17 TR (imperial) | 2.5387959760084 × 10-17 TR (imperial) |
The femtowatt (fW) is equal to one quadrillionth (10−15) of a watt. Technologically important powers that are measured in femtowatts are typically found in reference(s) to radio and radar receivers. For example, meaningful FM tuner performance figures for sensitivity, quieting and signal-to-noise require that the RF energy applied to the antenna input be specified. These input levels are often stated in dBf (decibels referenced to 1 femtowatt). This is 0.2739 microvolt across a 75-ohm load or 0.5477 microvolt across a 300-ohm load; the specification takes into account the RF input impedance of the tuner.
| 1 femtowatts ≈ 2.5387959760084E-19 imperial ton of refrigerations | 6 femtowatts ≈ 1.523277585605E-18 imperial ton of refrigerations |
| 2 femtowatts ≈ 5.0775919520168E-19 imperial ton of refrigerations | 7 femtowatts ≈ 1.7771571832059E-18 imperial ton of refrigerations |
| 3 femtowatts ≈ 7.6163879280251E-19 imperial ton of refrigerations | 8 femtowatts ≈ 2.0310367808067E-18 imperial ton of refrigerations |
| 4 femtowatts ≈ 1.0155183904034E-18 imperial ton of refrigerations | 9 femtowatts ≈ 2.2849163784075E-18 imperial ton of refrigerations |
| 5 femtowatts ≈ 1.2693979880042E-18 imperial ton of refrigerations | 10 femtowatts ≈ 2.5387959760084E-18 imperial ton of refrigerations |
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.
| 1 imperial ton of refrigerations ≈ 3.938875E+18 femtowatts | 6 imperial ton of refrigerations ≈ 2.363325E+19 femtowatts |
| 2 imperial ton of refrigerations ≈ 7.87775E+18 femtowatts | 7 imperial ton of refrigerations ≈ 2.7572125E+19 femtowatts |
| 3 imperial ton of refrigerations ≈ 1.1816625E+19 femtowatts | 8 imperial ton of refrigerations ≈ 3.1511E+19 femtowatts |
| 4 imperial ton of refrigerations ≈ 1.57555E+19 femtowatts | 9 imperial ton of refrigerations ≈ 3.5449875E+19 femtowatts |
| 5 imperial ton of refrigerations ≈ 1.9694375E+19 femtowatts | 10 imperial ton of refrigerations ≈ 3.938875E+19 femtowatts |
| 1 femtowatts ≈ 2.5387959760084 × 10-19 imperial ton of refrigerations |
| 1 imperial ton of refrigerations ≈ 3.938875 × 1018 femtowatts |