picowatt | 1 pW | 2 pW | 3 pW | 4 pW | 5 pW | 6 pW | 7 pW | 8 pW | 9 pW | 10 pW | 11 pW | 12 pW | 13 pW | 14 pW | 15 pW | 16 pW | 17 pW | 18 pW | 19 pW | 20 pW | 21 pW | 22 pW | 23 pW | 24 pW | 25 pW | 26 pW | 27 pW | 28 pW | 29 pW | 30 pW | 31 pW | 32 pW | 33 pW | 34 pW | 35 pW | 36 pW | 37 pW | 38 pW | 39 pW | 40 pW | 41 pW | 42 pW | 43 pW | 44 pW | 45 pW | 46 pW | 47 pW | 48 pW | 49 pW | 50 pW | 51 pW | 52 pW | 53 pW | 54 pW | 55 pW | 56 pW | 57 pW | 58 pW | 59 pW | 60 pW | 61 pW | 62 pW | 63 pW | 64 pW | 65 pW | 66 pW | 67 pW | 68 pW | 69 pW | 70 pW | 71 pW | 72 pW | 73 pW | 74 pW | 75 pW | 76 pW | 77 pW | 78 pW | 79 pW | 80 pW | 81 pW | 82 pW | 83 pW | 84 pW | 85 pW | 86 pW | 87 pW | 88 pW | 89 pW | 90 pW | 91 pW | 92 pW | 93 pW | 94 pW | 95 pW | 96 pW | 97 pW | 98 pW | 99 pW | 100 pW |
femtowatt | 1 000 fW | 2 000 fW | 3 000 fW | 4 000 fW | 5 000 fW | 6 000 fW | 7 000 fW | 8 000 fW | 9 000 fW | 10 000 fW | 11 000 fW | 12 000 fW | 13 000 fW | 14 000 fW | 15 000 fW | 16 000 fW | 17 000 fW | 18 000 fW | 19 000 fW | 20 000 fW | 21 000 fW | 22 000 fW | 23 000 fW | 24 000 fW | 25 000 fW | 26 000 fW | 27 000 fW | 28 000 fW | 29 000 fW | 30 000 fW | 31 000 fW | 32 000 fW | 33 000 fW | 34 000 fW | 35 000 fW | 36 000 fW | 37 000 fW | 38 000 fW | 39 000 fW | 40 000 fW | 41 000 fW | 42 000 fW | 43 000 fW | 44 000 fW | 45 000 fW | 46 000 fW | 47 000 fW | 48 000 fW | 49 000 fW | 50 000 fW | 51 000 fW | 52 000 fW | 53 000 fW | 54 000 fW | 55 000 fW | 56 000 fW | 57 000 fW | 58 000 fW | 59 000 fW | 60 000 fW | 61 000 fW | 62 000 fW | 63 000 fW | 64 000 fW | 65 000 fW | 66 000 fW | 67 000 fW | 68 000 fW | 69 000 fW | 70 000 fW | 71 000 fW | 72 000 fW | 73 000 fW | 74 000 fW | 75 000 fW | 76 000 fW | 77 000 fW | 78 000 fW | 79 000 fW | 80 000 fW | 81 000 fW | 82 000 fW | 83 000 fW | 84 000 fW | 85 000 fW | 86 000 fW | 87 000 fW | 88 000 fW | 89 000 fW | 90 000 fW | 91 000 fW | 92 000 fW | 93 000 fW | 94 000 fW | 95 000 fW | 96 000 fW | 97 000 fW | 98 000 fW | 99 000 fW | 100 000 fW |
The picowatt (pW), not to be confused with the much larger petawatt (PW), is equal to one trillionth (10−12) of a watt. Technologically important powers that are measured in picowatts are typically used in reference to radio and radar receivers, acoustics and in the science of radio astronomy.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
picowatt | pW | = 10-12 W | = 10-12 W | Metric system SI |
picowatts | femtowatts | picowatts | femtowatts |
---|---|---|---|
1 | = 1000 | 6 | = 6000 |
2 | = 2000 | 7 | = 7000 |
3 | = 3000 | 8 | = 8000 |
4 | = 4000 | 9 | = 9000 |
5 | = 5000 | 10 | = 10000 |
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.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
femtowatt | fW | = 10-15 W | = 10-15 W | Metric system SI |
femtowatts | picowatts | femtowatts | picowatts |
---|---|---|---|
1 | = 0.001 | 6 | = 0.006 |
2 | = 0.002 | 7 | = 0.007 |
3 | = 0.003 | 8 | = 0.008 |
4 | = 0.004 | 9 | = 0.009 |
5 | = 0.005 | 10 | = 0.01 |
picowatts | femtowatts |
---|---|
1 | = 1 000 |
0.001 | = 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 …) |