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1 mW = 0.001 W
1 Milliwatt equals 0.001 Watts

Milliwatts to Watts Conversion Table

Standard benchmark values from 1 to 1,000 mW in W.

Milliwatts (mW) Watts (W)
1 mW 0.001 W
2 mW 0.002 W
5 mW 0.005 W
10 mW 0.01 W
25 mW 0.025 W
50 mW 0.05 W
100 mW 0.1 W
250 mW 0.25 W
500 mW 0.5 W
1000 mW 1 W

Convert Milliwatts to Watts

Convert milliwatts to watts (mW to W) with our instant calculator. 1 mW = 0.001 W. Includes exact formula and reference tables.

How to Convert Milliwatts to Watts (mW to W)

1 Milliwatt (mW) is equal to 0.001 Watts (W). Divide the milliwatt value by 1000

Quick Answer 1 mW = 0.001 W
Formula W = mW / 1000
Inverse Factor 1 W = 1000 mW

Unit Definitions & Metrology Context

The SI unit of power is the watt (W), equal to 1 joule per second. 1 mechanical horsepower equals ~745.7 watts.

About Milliwatts (mW): Milliwatt (mW) is a unit in the Power measurement category. It is widely used in rf transmitters, wi-fi & laser output. Relative to the power base unit, 1 mW equals 0.001 Watts (W).

About Watts (W): Watt (W) is a unit in the Power measurement category. It is a standard everyday unit of power measurement. The watt (W) serves as the primary reference base unit for the power domain.

Need to convert in the opposite direction? Visit our Convert Watts to Milliwatts (W to mW) calculator (1 W = 1000 mW).

Step-by-Step Worked Examples (mW to W)

  • Convert 5 Milliwatts to Watts: Applying the formula (W = mW / 1000): starting with 5 mW, divide the milliwatt value by 1000 to get 0.005 W.
  • Convert 10 Milliwatts to Watts: Applying the formula (W = mW / 1000): starting with 10 mW, divide the milliwatt value by 1000 to get 0.01 W.
  • Convert 50 Milliwatts to Watts: Applying the formula (W = mW / 1000): starting with 50 mW, divide the milliwatt value by 1000 to get 0.05 W.

Popular Power Conversions

Horsepower (Mechanical/US) ⇄ Kilowatt
1 mechanical horsepower equals approximately 0.7457 kilowatts.
Kilowatt ⇄ Horsepower (Mechanical/US)
Multiply kilowatts by ~1.34102 to calculate mechanical horsepower.
Kilowatt ⇄ Watt
1 kilowatt equals exactly 1,000 watts.
Megawatt ⇄ Kilowatt
1 megawatt equals exactly 1,000 kilowatts or 1,000,000 watts.

Frequently Asked Questions

Verified answers and formulas for converting milliwatts to watts.

How many watts are in 1 milliwatt?

There are 0.001 watts (W) in 1 milliwatt (mW). Conversely, 1 watt equals 1000 milliwatts.

How do you convert milliwatts to watts?

To convert milliwatts (mW) to watts (W), use the formula: W = mW / 1000. Divide the milliwatt value by 1000. For example, 10 mW equals 0.01 W.

How do I convert back from watts to milliwatts?

To convert in the reverse direction from watts (W) to milliwatts (mW), use the inverse formula: mW = W × 1000. Multiply the watt value by 1000 (1 W = 1000 mW).

What is the difference between milliwatt (mW) and watt (W)?

Both milliwatt and watt measure power. Milliwatt (mW) is a unit in the Power measurement category. It is widely used in rf transmitters, wi-fi & laser output. Relative to the power base unit, 1 mW equals 0.001 Watts (W). Watt (W) is a unit in the Power measurement category. It is a standard everyday unit of power measurement. The watt (W) serves as the primary reference base unit for the power domain.

How many watts are in 1 horsepower?

1 mechanical (imperial) horsepower equals approximately 745.7 watts. 1 metric horsepower (PS) equals ~735.5 watts.