nanowatt | 1 nW | 2 nW | 3 nW | 4 nW | 5 nW | 6 nW | 7 nW | 8 nW | 9 nW | 10 nW | 11 nW | 12 nW | 13 nW | 14 nW | 15 nW | 16 nW | 17 nW | 18 nW | 19 nW | 20 nW | 21 nW | 22 nW | 23 nW | 24 nW | 25 nW | 26 nW | 27 nW | 28 nW | 29 nW | 30 nW | 31 nW | 32 nW | 33 nW | 34 nW | 35 nW | 36 nW | 37 nW | 38 nW | 39 nW | 40 nW | 41 nW | 42 nW | 43 nW | 44 nW | 45 nW | 46 nW | 47 nW | 48 nW | 49 nW | 50 nW | 51 nW | 52 nW | 53 nW | 54 nW | 55 nW | 56 nW | 57 nW | 58 nW | 59 nW | 60 nW | 61 nW | 62 nW | 63 nW | 64 nW | 65 nW | 66 nW | 67 nW | 68 nW | 69 nW | 70 nW | 71 nW | 72 nW | 73 nW | 74 nW | 75 nW | 76 nW | 77 nW | 78 nW | 79 nW | 80 nW | 81 nW | 82 nW | 83 nW | 84 nW | 85 nW | 86 nW | 87 nW | 88 nW | 89 nW | 90 nW | 91 nW | 92 nW | 93 nW | 94 nW | 95 nW | 96 nW | 97 nW | 98 nW | 99 nW | 100 nW |
femtowatt | 1 000 000 fW | 2 000 000 fW | 3 000 000 fW | 4 000 000 fW | 5 000 000 fW | 6 000 000 fW | 7 000 000 fW | 8 000 000 fW | 9 000 000 fW | 10 000 000 fW | 11 000 000 fW | 12 000 000 fW | 13 000 000 fW | 14 000 000 fW | 15 000 000 fW | 16 000 000 fW | 17 000 000 fW | 18 000 000 fW | 19 000 000 fW | 20 000 000 fW | 21 000 000 fW | 22 000 000 fW | 23 000 000 fW | 24 000 000 fW | 25 000 000 fW | 26 000 000 fW | 27 000 000 fW | 28 000 000 fW | 29 000 000 fW | 30 000 000 fW | 31 000 000 fW | 32 000 000 fW | 33 000 000 fW | 34 000 000 fW | 35 000 000 fW | 36 000 000 fW | 37 000 000 fW | 38 000 000 fW | 39 000 000 fW | 40 000 000 fW | 41 000 000 fW | 42 000 000 fW | 43 000 000 fW | 44 000 000 fW | 45 000 000 fW | 46 000 000 fW | 47 000 000 fW | 48 000 000 fW | 49 000 000 fW | 50 000 000 fW | 51 000 000 fW | 52 000 000 fW | 53 000 000 fW | 54 000 000 fW | 55 000 000 fW | 56 000 000 fW | 57 000 000 fW | 58 000 000 fW | 59 000 000 fW | 60 000 000 fW | 61 000 000 fW | 62 000 000 fW | 63 000 000 fW | 64 000 000 fW | 65 000 000 fW | 66 000 000 fW | 67 000 000 fW | 68 000 000 fW | 69 000 000 fW | 70 000 000 fW | 71 000 000 fW | 72 000 000 fW | 73 000 000 fW | 74 000 000 fW | 75 000 000 fW | 76 000 000 fW | 77 000 000 fW | 78 000 000 fW | 79 000 000 fW | 80 000 000 fW | 81 000 000 fW | 82 000 000 fW | 83 000 000 fW | 84 000 000 fW | 85 000 000 fW | 86 000 000 fW | 87 000 000 fW | 88 000 000 fW | 89 000 000 fW | 90 000 000 fW | 91 000 000 fW | 92 000 000 fW | 93 000 000 fW | 94 000 000 fW | 95 000 000 fW | 96 000 000 fW | 97 000 000 fW | 98 000 000 fW | 99 000 000 fW | 100 000 000 fW |
The nanowatt (nW) is equal to one billionth (10−9) of a watt. Important powers that are measured in nanowatts are also typically used in reference to radio and radar receivers.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
nanowatt | nW | = 10-9 W | = 10-9 W | Metric system SI |
nanowatts | femtowatts | nanowatts | femtowatts |
---|---|---|---|
1 | = 1000000 | 6 | = 6000000 |
2 | = 2000000 | 7 | = 7000000 |
3 | = 3000000 | 8 | = 8000000 |
4 | = 4000000 | 9 | = 9000000 |
5 | = 5000000 | 10 | = 10000000 |
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 | nanowatts | femtowatts | nanowatts |
---|---|---|---|
1 | = 1.0E-6 | 6 | = 6.0E-6 |
2 | = 2.0E-6 | 7 | = 7.0E-6 |
3 | = 3.0E-6 | 8 | = 8.0E-6 |
4 | = 4.0E-6 | 9 | = 9.0E-6 |
5 | = 5.0E-6 | 10 | = 1.0E-5 |
nanowatts | femtowatts |
---|---|
1 | = 1 000 000 |
1.0 × 10-6 | = 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 …) |