| watt | 1 W | 2 W | 3 W | 4 W | 5 W | 6 W | 7 W | 8 W | 9 W | 10 W | 11 W | 12 W | 13 W | 14 W | 15 W | 16 W | 17 W | 18 W | 19 W | 20 W | 21 W | 22 W | 23 W | 24 W | 25 W | 26 W | 27 W | 28 W | 29 W | 30 W | 31 W | 32 W | 33 W | 34 W | 35 W | 36 W | 37 W | 38 W | 39 W | 40 W | 41 W | 42 W | 43 W | 44 W | 45 W | 46 W | 47 W | 48 W | 49 W | 50 W | 51 W | 52 W | 53 W | 54 W | 55 W | 56 W | 57 W | 58 W | 59 W | 60 W | 61 W | 62 W | 63 W | 64 W | 65 W | 66 W | 67 W | 68 W | 69 W | 70 W | 71 W | 72 W | 73 W | 74 W | 75 W | 76 W | 77 W | 78 W | 79 W | 80 W | 81 W | 82 W | 83 W | 84 W | 85 W | 86 W | 87 W | 88 W | 89 W | 90 W | 91 W | 92 W | 93 W | 94 W | 95 W | 96 W | 97 W | 98 W | 99 W | 100 W |
| femtowatt | 1.0 × 1015 fW | 2.0 × 1015 fW | 3.0 × 1015 fW | 4.0 × 1015 fW | 5.0 × 1015 fW | 6.0 × 1015 fW | 7.0 × 1015 fW | 8.0 × 1015 fW | 9.0 × 1015 fW | 1.0 × 1016 fW | 1.1 × 1016 fW | 1.2 × 1016 fW | 1.3 × 1016 fW | 1.4 × 1016 fW | 1.5 × 1016 fW | 1.6 × 1016 fW | 1.7 × 1016 fW | 1.8 × 1016 fW | 1.9 × 1016 fW | 2.0 × 1016 fW | 2.1 × 1016 fW | 2.2 × 1016 fW | 2.3 × 1016 fW | 2.4 × 1016 fW | 2.5 × 1016 fW | 2.6 × 1016 fW | 2.7 × 1016 fW | 2.8 × 1016 fW | 2.9 × 1016 fW | 3.0 × 1016 fW | 3.1 × 1016 fW | 3.2 × 1016 fW | 3.3 × 1016 fW | 3.4 × 1016 fW | 3.5 × 1016 fW | 3.6 × 1016 fW | 3.7 × 1016 fW | 3.8 × 1016 fW | 3.9 × 1016 fW | 4.0 × 1016 fW | 4.1 × 1016 fW | 4.2 × 1016 fW | 4.3 × 1016 fW | 4.4 × 1016 fW | 4.5 × 1016 fW | 4.6 × 1016 fW | 4.7 × 1016 fW | 4.8 × 1016 fW | 4.9 × 1016 fW | 5.0 × 1016 fW | 5.1 × 1016 fW | 5.2 × 1016 fW | 5.3 × 1016 fW | 5.4 × 1016 fW | 5.5 × 1016 fW | 5.6 × 1016 fW | 5.7 × 1016 fW | 5.8 × 1016 fW | 5.9 × 1016 fW | 6.0 × 1016 fW | 6.1 × 1016 fW | 6.2 × 1016 fW | 6.3 × 1016 fW | 6.4 × 1016 fW | 6.5 × 1016 fW | 6.6 × 1016 fW | 6.7 × 1016 fW | 6.8 × 1016 fW | 6.9 × 1016 fW | 7.0 × 1016 fW | 7.1 × 1016 fW | 7.2 × 1016 fW | 7.3 × 1016 fW | 7.4 × 1016 fW | 7.5 × 1016 fW | 7.6 × 1016 fW | 7.7 × 1016 fW | 7.8 × 1016 fW | 7.9 × 1016 fW | 8.0 × 1016 fW | 8.1 × 1016 fW | 8.2 × 1016 fW | 8.3 × 1016 fW | 8.4 × 1016 fW | 8.5 × 1016 fW | 8.6 × 1016 fW | 8.7 × 1016 fW | 8.8 × 1016 fW | 8.9 × 1016 fW | 9.0 × 1016 fW | 9.1 × 1016 fW | 9.2 × 1016 fW | 9.3 × 1016 fW | 9.4 × 1016 fW | 9.5 × 1016 fW | 9.6 × 1016 fW | 9.7 × 1016 fW | 9.8 × 1016 fW | 9.9 × 1016 fW | 1.0 × 1017 fW |
The watt (symbol: W) is a derived unit of power in the International System of Units (SI) defined as 1 joule per second and can be used to quantify the rate of energy transfer. Power has dimensions of ML2T-3.
| 1 watts = 1.0E+15 femtowatts | 6 watts = 6.0E+15 femtowatts |
| 2 watts = 2.0E+15 femtowatts | 7 watts = 7.0E+15 femtowatts |
| 3 watts = 3.0E+15 femtowatts | 8 watts = 8.0E+15 femtowatts |
| 4 watts = 4.0E+15 femtowatts | 9 watts = 9.0E+15 femtowatts |
| 5 watts = 5.0E+15 femtowatts | 10 watts = 1.0E+16 femtowatts |
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 = 1.0E-15 watts | 6 femtowatts = 6.0E-15 watts |
| 2 femtowatts = 2.0E-15 watts | 7 femtowatts = 7.0E-15 watts |
| 3 femtowatts = 3.0E-15 watts | 8 femtowatts = 8.0E-15 watts |
| 4 femtowatts = 4.0E-15 watts | 9 femtowatts = 9.0E-15 watts |
| 5 femtowatts = 5.0E-15 watts | 10 femtowatts = 1.0E-14 watts |
| 1 watts = 1.0 × 1015 femtowatts |
| 1 femtowatts = 1.0 × 10-15 watts |