Convert watts to milliwatt

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Watt

The watt (symbol: W ) is a unit of power. In the International System of Units (SI) it is defined as a derived unit of 1 joule per second, and is used to quantify the rate of energy transfer. In SI base units, the watt is described as kg⋅m 2 ⋅s −3 , which can be demonstrated to be coherent by dimensional analysis. The watt is named after James Watt, an 18th-century Scottish inventor. 


Milliwatt

The milliwatt (mW) is a unit of power equal to one thousandth of a watt (10−3 W). It is commonly used in electronics and telecommunications to express the power of signals, laser outputs, and low-power devices such as hearing aids and wireless sensors. Signal strength in radio and audio engineering is frequently described in milliwatts or in decibels relative to one milliwatt (dBm). 


Watt to Milliwatt conversion table
WattMilliwattMilliwattWatt
1100010.001
2200020.002
3300030.003
5500050.005
1010000100.01
2020000200.02
2525000250.025
5050000500.05
1001000001000.1
2502500002500.25
5005000005000.5
10001E+0610001
How to convert Watt to Milliwatt

1 W = 1000 mW. To convert any value, multiply it by 1000. For example, 25 W = 25000 mW.

Frequently asked questions
How many mW are there in one W?
One W is equal to 1000 mW.
How do you convert Watt to Milliwatt?
Multiply the value in Watt by 1000 to get the result in Milliwatt.
How much is 25 W in mW?
25 W is equal to 25000 mW.
How do you convert Milliwatt back to Watt?
Divide by the same factor: multiply the value in Milliwatt by 0.001 to get Watt.

Most common power unit conversions