Use this free online power converter to change watts into decibel-milliwatts instantly. Type in the watts value, and the equivalent decibel-milliwatts is calculated for you in real time.
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Watts
Decibel-milliwatts
How to use this Watts to Decibel-milliwatts Converter 🤔
Follow these steps to convert given Watts value from Watts units to Decibel-milliwatts units.
Enter the input Watts value in the text field.
The given Watts is converted to Decibel-milliwatts in realtime ⌚ using the formula, and displayed under the Decibel-milliwatts label.
You may copy the resulting Decibel-milliwatts value using the Copy button.
Formula
To convert given power from Watts to Decibel-milliwatts, use the following formula.
Calculation will be done after you enter a valid input.
Watts to Decibel-milliwatts Conversion Table
The following table gives some of the most used conversions from Watts to Decibel-milliwatts.
Watts (W)
Decibel-milliwatts (dBm)
0.01 W
10 dBm
0.1 W
20 dBm
1 W
30 dBm
2 W
33.0103dBm
3 W
34.7712dBm
4 W
36.0206dBm
5 W
36.9897dBm
6 W
37.7815dBm
7 W
38.451dBm
8 W
39.0309dBm
9 W
39.5424dBm
10 W
40 dBm
20 W
43.0103dBm
50 W
46.9897dBm
100 W
50 dBm
1000 W
60 dBm
Watts
The watt (W) is the SI unit of power, defined as one joule per second. It is used to measure the rate of energy transfer and is commonly used in a wide range of applications, including electricity, mechanics, and heating.
Decibel-milliwatts
A decibel milliwatt (dBm) is a unit of power level used in radio, microwave, and fiber-optic communication networks. It is a logarithmic unit that expresses power relative to one milliwatt.
{
"conversion": "watt-decibel_milliwatt",
"x_slug": "watt",
"y_slug": "decibel_milliwatt",
"x": "W",
"y": "dBm",
"x_desc": "Watts",
"y_desc": "Decibel-milliwatts",
"category": "Power",
"symbol": "m",
"formula": "10*Math.log(x*1000)*Math.LOG10E",
"precision": 11,
"examples": "<div class=\"example\">\n <div class=\"example_head\"><span class=\"example_n\">1</span>\n <h3 class=\"question\">Consider that a smartphone charger delivers 15 watts (W) of power.<br>Convert this power output from watts to Decibel-milliwatts.</h3></div>\n <h4 class=\"answer\">Answer:</h4>\n <p><strong>Given:</strong></p>\n <p>The power in watts is:</p>\n <p class=\"step\"><span>Power<sub>(Watts)</sub></span> = 15</p>\n <p><strong>Formula:</strong></p>\n <p>The formula to convert power from watts to decibel-milliwatts is:</p>\n <p class=\"formula step\"><span>Power<sub>(Decibel-milliwatts)</sub></span> = 10 × Math.log(<span>Power<sub>(Watts)</sub></span> × 1000) × Math.LOG10E</p>\n <p><strong>Substitution:</strong></p>\n <p>Substitute given weight <strong>Power<sub>(Watts)</sub> = 15</strong> in the above formula.</p>\n <p class=\"step\"><span>Power<sub>(Decibel-milliwatts)</sub></span> = 10 × Math.log(<span>15</span> × 1000) × Math.LOG10E</p>\n <p class=\"step\"><span>Power<sub>(Decibel-milliwatts)</sub></span> = 41.7609</p>\n <p><strong>Final Answer:</strong></p>\n <p>Therefore, <strong>15 W</strong> is equal to <strong>41.7609 dBm</strong>.</p>\n <p>The power is <strong>41.7609 dBm</strong>, in decibel-milliwatts.</p>\n </div>\n <div class=\"example\">\n <div class=\"example_head\"><span class=\"example_n\">2</span>\n <h3 class=\"question\">Consider that a laptop uses 65 watts (W) of power while charging.<br>Convert this power usage from watts to Decibel-milliwatts.</h3></div>\n <h4 class=\"answer\">Answer:</h4>\n <p><strong>Given:</strong></p>\n <p>The power in watts is:</p>\n <p class=\"step\"><span>Power<sub>(Watts)</sub></span> = 65</p>\n <p><strong>Formula:</strong></p>\n <p>The formula to convert power from watts to decibel-milliwatts is:</p>\n <p class=\"formula step\"><span>Power<sub>(Decibel-milliwatts)</sub></span> = 10 × Math.log(<span>Power<sub>(Watts)</sub></span> × 1000) × Math.LOG10E</p>\n <p><strong>Substitution:</strong></p>\n <p>Substitute given weight <strong>Power<sub>(Watts)</sub> = 65</strong> in the above formula.</p>\n <p class=\"step\"><span>Power<sub>(Decibel-milliwatts)</sub></span> = 10 × Math.log(<span>65</span> × 1000) × Math.LOG10E</p>\n <p class=\"step\"><span>Power<sub>(Decibel-milliwatts)</sub></span> = 48.1291</p>\n <p><strong>Final Answer:</strong></p>\n <p>Therefore, <strong>65 W</strong> is equal to <strong>48.1291 dBm</strong>.</p>\n <p>The power is <strong>48.1291 dBm</strong>, in decibel-milliwatts.</p>\n </div>\n ",
"img": "<img class=\"conversion\" src=\"/images/unit/power/watt-decibel_milliwatt.webp\" height=\"360\" width=\"640\" alt=\"Watts to Decibel-milliwatts Converter | W to dBm\" />",
"table1n": "<h2><span class=\"x\">Watts</span> to <span class=\"y\">Decibel-milliwatts</span> Conversion Table</h2><p>The following table gives some of the most used conversions from Watts to Decibel-milliwatts.</p><table><thead><tr><th scope=\"column\" role=\"columnheader\">Watts (<span class=\"unit\">W</span>)</th><th scope=\"column\" role=\"columnheader\">Decibel-milliwatts (<span class=\"unit\">dBm</span>)</th><tr></thead><tbody><tr><td>0.01 <span class=\"unit\">W</span></td><td>10 <span class=\"unit\">dBm</span></td></tr><tr><td>0.1 <span class=\"unit\">W</span></td><td>20 <span class=\"unit\">dBm</span></td></tr><tr><td>1 <span class=\"unit\">W</span></td><td>30 <span class=\"unit\">dBm</span></td></tr><tr><td>2 <span class=\"unit\">W</span></td><td>33<span>.0103</span> <span class=\"unit\">dBm</span></td></tr><tr><td>3 <span class=\"unit\">W</span></td><td>34<span>.7712</span> <span class=\"unit\">dBm</span></td></tr><tr><td>4 <span class=\"unit\">W</span></td><td>36<span>.0206</span> <span class=\"unit\">dBm</span></td></tr><tr><td>5 <span class=\"unit\">W</span></td><td>36<span>.9897</span> <span class=\"unit\">dBm</span></td></tr><tr><td>6 <span class=\"unit\">W</span></td><td>37<span>.7815</span> <span class=\"unit\">dBm</span></td></tr><tr><td>7 <span class=\"unit\">W</span></td><td>38<span>.451</span> <span class=\"unit\">dBm</span></td></tr><tr><td>8 <span class=\"unit\">W</span></td><td>39<span>.0309</span> <span class=\"unit\">dBm</span></td></tr><tr><td>9 <span class=\"unit\">W</span></td><td>39<span>.5424</span> <span class=\"unit\">dBm</span></td></tr><tr><td>10 <span class=\"unit\">W</span></td><td>40 <span class=\"unit\">dBm</span></td></tr><tr><td>20 <span class=\"unit\">W</span></td><td>43<span>.0103</span> <span class=\"unit\">dBm</span></td></tr><tr><td>50 <span class=\"unit\">W</span></td><td>46<span>.9897</span> <span class=\"unit\">dBm</span></td></tr><tr><td>100 <span class=\"unit\">W</span></td><td>50 <span class=\"unit\">dBm</span></td></tr><tr><td>1000 <span class=\"unit\">W</span></td><td>60 <span class=\"unit\">dBm</span></td></tr></table>",
"units": [
[
"milliwatt",
"Milliwatts",
"mW"
],
[
"watt",
"Watts",
"W"
],
[
"kilowatt",
"Kilowatts",
"kW"
],
[
"megawatt",
"Megawatts",
"MW"
],
[
"gigawatt",
"Gigawatts",
"GW"
],
[
"decibel_milliwatt",
"Decibel-milliwatts",
"dBm"
],
[
"decibel_watt",
"Decibel-watts",
"dBW"
],
[
"horsepower_mechanic",
"Horsepower (Mechanic)",
"hp(I)"
],
[
"horsepower_electric",
"Horsepower (Electric)",
"hp(E)"
],
[
"btu_hr",
"BTU/hr",
"BTU/hr"
]
],
"x_long_desc": "The watt (W) is the SI unit of power, defined as one joule per second. It is used to measure the rate of energy transfer and is commonly used in a wide range of applications, including electricity, mechanics, and heating.",
"y_long_desc": "A decibel milliwatt (dBm) is a unit of power level used in radio, microwave, and fiber-optic communication networks. It is a logarithmic unit that expresses power relative to one milliwatt."
}
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