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Milliwatts to Watts Converter

Convert milliwatts to watts and watts to milliwatts instantly. Bidirectional power converter with formula and common values.

mW

Watts

0.5

W

500 mW = 0.5 W

W = mW × 0.001

Milliwatts to Watts: 1 mW equals 0.001 W. To convert milliwatts to watts, multiply by 0.001 (W = mW × 0.001). For example, 10 mW = 0.01 W.

How to Convert Milliwatts to Watts

To convert from milliwatts to watts, multiply the value by 0.001. The conversion is linear, meaning doubling the input doubles the output.

Conversion Formula

  • Milliwatts to Watts: W = mW × 0.001
  • Watts to Milliwatts: mW = W ÷ 0.001

Milliwatts to Watts Conversion Chart

Milliwatts (mW)Watts (W)
0.10.0001
0.250.00025
0.50.0005
10.001
20.002
30.003
50.005
100.01
200.02
250.025
500.05
1000.1
2500.25
10001

Understanding the Units

What is a Milliwatt?

A milliwatt equals one thousandth of a watt (10⁻³ W).

Common contexts: radio transmitters, lasers, electronics.

What is a Watt?

The watt is the SI derived unit of power, equal to one joule per second (1 W = 1 J/s = 1 V·A).

Named after James Watt (1736–1819), the Scottish engineer whose improvements to the steam engine helped drive the Industrial Revolution.

Common contexts: electricity, mechanics, lighting.

Real-World Reference Points

Item Milliwatts (mW) Watts (W)
LED bulb90009
Incandescent bulb (old)6000060
Microwave oven10000001000

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FAQ

How do I convert milliwatts to watts?

Divide the milliwatt value by 1,000 or multiply by 0.001. For example, 500 mW = 0.5 W.

What devices operate in the milliwatt range?

Bluetooth transmitters (1-100 mW), laser pointers (1-5 mW), hearing aids, and low-power IoT sensors typically operate at milliwatt levels.

How are milliwatts related to dBm?

dBm is a logarithmic power unit referenced to 1 milliwatt. 0 dBm = 1 mW, 10 dBm = 10 mW, 20 dBm = 100 mW.

How many watts are in 1 milliwatt?

1 mW equals 0.001 W.

How do you convert milliwatts to watts?

Multiply the milliwatt value by 0.001. Formula: W = mW × 0.001.

How many watts are in 5 milliwatts?

5 mW = 0.005 W.

How do you convert watts back to milliwatts?

Use the inverse formula: mW = W ÷ 0.001. For example, 1 W = 1000 mW.

What is the difference between Milliwatt and Watt?

A milliwatt equals one thousandth of a watt (10⁻³ W). The watt is the SI derived unit of power, equal to one joule per second (1 W = 1 J/s = 1 V·A).