1000 Milliwatts to Watts

1000 mW = 1 W

Calculation: W = 1000 mW × 0.001 = 1 W

Milliwatt to Watt Converter

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How much power is 1,000 mW?

1 W is comparable to a smartphone charger.

What does 1,000 mW look like?

Comparable to a smartphone charger
1 W is comparable to a smartphone charger.

How to Convert Milliwatt to Watt

1 milliwatt = 0.001 watts

Watt = Milliwatt × 0.001

Example: 1000 mW × 0.001 = 1 W

Reverse Conversion

To convert watts back to milliwatts:

  • Remember, 1 watt equals 1000 milliwatts.
  • To convert 1 W to mW, multiply 1 x 1000, resulting in 1000 mW.

1000 mW is also equal to:

  • 0.001 kilowatt
  • 0.0013405 horsepower (electric)
About these units

Milliwatt: SI multiple equal to one thousandth of a watt.

Watt: SI base unit of power equal to one joule per second.

Frequently Asked Questions

How much is 1000 milliwatts in watts?

1000 milliwatts equals 1 watt. This is calculated by multiplying 1000 by the conversion factor 0.001.

What does 1000 milliwatts look like in watts?

1000 milliwatts equals 1 watt, a conversion commonly needed for comparing engine ratings, electrical appliances, and generator capacities.

How do you calculate 1000 milliwatts to watts?

Multiply 1000 by the conversion factor 0.001. The calculation is 1000 × 0.001 = 1 watt. This factor is defined by international measurement standards.

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1000 milliwatts = 1 watt
1000 milliwatts = 1 watt — conversion chart

For general conversions between milliwatts and watts, see the milliwatts to watts converter.

Conversion factors verified against NIST, BIPM, ISO 80000-4 Based on SI base units (W = J/s, BIPM). Last reviewed: April 2026
Adilson Fernandes By Adilson Fernandes
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.