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How to Convert Milliwatts to Watts.
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How to Convert Milliwatts to Watts.

Rosemary Njeri

In this article, we will discuss how to convert Milliwatts (mW) to Watts (W) but first lets begin by defining what they are. Simply put Watt is the SI unit of power.

In the metric system, milli is the prefix for 10–³. Therefore, a milliwatt (mW) is equal to one thousandth of a watt. It is very easy to convert mW to W as they are both units of power and are directly related.

Formula to Convert Milliwatts to Watts.

Since we know that a mW is equal to one thousandth of a watt.

Therefore, to convert power given in mW to W, we divide the milliwatt value by 1,000.

Power in W = Power in mW ÷ 1,000

Example 1

Convert 5,000 mW to W.

= 5,000 ÷ 1,000

= 5 watts

Example 2:

Suppose you have a power meter that showed a power draw of 2 watts and 600 milliwatts. Convert this the power drawn to Watts.

Convert mW to W

= 600 ÷ 1,000

= 0.6 Watts

Put them Together.

= 2 + 0.6

= 2.6 Watts

Example 3.

Suppose a LED bulb uses just seven thousand mW while a fluorescent light bulb consumes 1600 mW. Calculate the difference in power in watts used by the two bulbs.

LED bulb

= 7000 ÷ 1,000

= 7 Watts

Fluorescent bulb.

= 1600 ÷ 1,000

= 1.6 Watts

Difference.

= 7W – 1.6W

= 5.4 Watts.

Example 4.

Suppose an OLED TV consumes 60000 milliwatts per hour. If you left it on for three and a half hours, calculate the power it consumed in Watts.

mW to W

= 60,000 ÷ 1,000

= 60 Watts.

If one hour is 60 watts, what about 31/2 hours

= 60 x 3.5

= 210 Watts.

mW to W Conversion Table.

Power in mWPower in W
1mW0.001W
2mW 0.002W
3mW0.003W
4mW0.004W
5mW0.005W
6mW0.006W
7mW0.007W
8mW0.008W
9mW0.009W
10mW0.010W
20mW0.020W
30mW0.030W
40mW0.040W
50mW0.050W
60mW0.060W
70mW0.070W
80mW0.080W
100mW0.100W
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