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 |
milliwatt | 1 000 mW | 2 000 mW | 3 000 mW | 4 000 mW | 5 000 mW | 6 000 mW | 7 000 mW | 8 000 mW | 9 000 mW | 10 000 mW | 11 000 mW | 12 000 mW | 13 000 mW | 14 000 mW | 15 000 mW | 16 000 mW | 17 000 mW | 18 000 mW | 19 000 mW | 20 000 mW | 21 000 mW | 22 000 mW | 23 000 mW | 24 000 mW | 25 000 mW | 26 000 mW | 27 000 mW | 28 000 mW | 29 000 mW | 30 000 mW | 31 000 mW | 32 000 mW | 33 000 mW | 34 000 mW | 35 000 mW | 36 000 mW | 37 000 mW | 38 000 mW | 39 000 mW | 40 000 mW | 41 000 mW | 42 000 mW | 43 000 mW | 44 000 mW | 45 000 mW | 46 000 mW | 47 000 mW | 48 000 mW | 49 000 mW | 50 000 mW | 51 000 mW | 52 000 mW | 53 000 mW | 54 000 mW | 55 000 mW | 56 000 mW | 57 000 mW | 58 000 mW | 59 000 mW | 60 000 mW | 61 000 mW | 62 000 mW | 63 000 mW | 64 000 mW | 65 000 mW | 66 000 mW | 67 000 mW | 68 000 mW | 69 000 mW | 70 000 mW | 71 000 mW | 72 000 mW | 73 000 mW | 74 000 mW | 75 000 mW | 76 000 mW | 77 000 mW | 78 000 mW | 79 000 mW | 80 000 mW | 81 000 mW | 82 000 mW | 83 000 mW | 84 000 mW | 85 000 mW | 86 000 mW | 87 000 mW | 88 000 mW | 89 000 mW | 90 000 mW | 91 000 mW | 92 000 mW | 93 000 mW | 94 000 mW | 95 000 mW | 96 000 mW | 97 000 mW | 98 000 mW | 99 000 mW | 100 000 mW |
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.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
watt | W | The power which in one second of time gives rise to one joule of energy. | = 1 W = 1 J/s = 1 N·m/s = 1 kg·m2/s3 | Metric system SI |
watts | milliwatts | watts | milliwatts |
---|---|---|---|
1 | = 1000 | 6 | = 6000 |
2 | = 2000 | 7 | = 7000 |
3 | = 3000 | 8 | = 8000 |
4 | = 4000 | 9 | = 9000 |
5 | = 5000 | 10 | = 10000 |
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 | watts | milliwatts | watts |
---|---|---|---|
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 |
watts | milliwatts |
---|---|
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 …) |