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Watt [W] to Milliwatt [mW] Converter

Quick Reference

1 Watt (W) = 1000 Milliwatt (mW)

1 Milliwatt (mW) = 0.001 Watt (W)

How to Convert Watt to Milliwatt

1 W = 1000 mW
1 mW = 0.001 W

To convert Watt to Milliwatt, multiply the value by 1000. To convert Milliwatt back to Watt, divide by 1000.

Example: convert 10 W to mW:
10 W = 10 x 1000 = 10000 mW

↔ Convert Milliwatt to Watt

Watt

Definition: The watt (W) is the derived unit of power in the International System of Units (SI). It is defined as one joule per second and represents the rate at which energy is transferred or converted.

History/origin: The watt is named in honor of Scottish inventor James Watt, who significantly improved the steam engine. The unit was adopted by the Second Congress of the British Association for the Advancement of Science in 1882.

Current use: Watts are used universally to measure power consumption and generation in electrical and mechanical systems. It is a fundamental unit for specifying the power rating of appliances, light bulbs, and engines.

Milliwatt

Definition: A milliwatt (mW) is a unit of power equal to one thousandth (10⁻³) of a watt. It is a subunit of the base unit, the watt, in the International System of Units (SI).

History/origin: The watt is named in honor of Scottish inventor James Watt. The milliwatt, as a decimal multiple of the watt, was naturally derived as a smaller, more convenient unit for measuring smaller powers.

Current use: Milliwatts are used to measure small power levels in electronic circuits, audio equipment, and wireless communication devices. It's used where power consumption is low.

Watt to Milliwatt Conversion Table

Watt [W]Milliwatt [mW]
1 W1000 mW
2 W2000 mW
5 W5000 mW
10 W10000 mW
20 W20000 mW
50 W50000 mW
100 W100000 mW
200 W200000 mW
500 W500000 mW
1000 W1000000 mW

Common Watt to Milliwatt conversions

  • 1 W = 1,000 mW
  • 2 W = 2,000 mW
  • 3 W = 3,000 mW
  • 4 W = 4,000 mW
  • 5 W = 5,000 mW
  • 6 W = 6,000 mW
  • 7 W = 7,000 mW
  • 8 W = 8,000 mW
  • 9 W = 9,000 mW
  • 10 W = 10,000 mW
  • 12 W = 12,000 mW
  • 15 W = 15,000 mW
  • 20 W = 20,000 mW
  • 25 W = 25,000 mW
  • 30 W = 30,000 mW
  • 40 W = 40,000 mW
  • 50 W = 50,000 mW
  • 60 W = 60,000 mW
  • 75 W = 75,000 mW
  • 100 W = 100,000 mW
  • 150 W = 150,000 mW
  • 200 W = 200,000 mW
  • 250 W = 250,000 mW
  • 300 W = 300,000 mW
  • 500 W = 500,000 mW
  • 750 W = 750,000 mW
  • 1,000 W = 1,000,000 mW

Watt [W] to Milliwatt [mW] Converter

What is 1 W in mW?
1 Watt (W) equals 1,000 mW, and 1 mW equals 0.001 W.
How do I convert Watt to Milliwatt?
Multiply by 1,000: 10 W × 1,000 = 10,000 mW. The converter above does it for any value, with the precision you choose.
What is 100 W in mW?
100 W = 100,000 mW. Common amounts are listed on this page, each with its own step-by-step page.
Is a Watt bigger than a Milliwatt?
Yes. 1 W = 1,000 mW, so the same quantity becomes a larger number when written in mW.
Watt to Milliwatt Converter | UtilLab