ConvertThings
1 W = 1000 mW
1 Watt equals 1000 Milliwatts

Watts to Milliwatts Conversion Table

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

Watts (W) Milliwatts (mW)
1 W 1000 mW
2 W 2000 mW
5 W 5000 mW
10 W 10000 mW
25 W 25000 mW
50 W 50000 mW
100 W 100000 mW
250 W 250000 mW
500 W 500000 mW
1000 W 1000000 mW

Convert Watts to Milliwatts

Convert watts to milliwatts (W to mW) with our instant calculator. 1 W = 1000 mW. Includes exact formula and reference tables.

How to Convert Watts to Milliwatts (W to mW)

1 Watt (W) is equal to 1000 Milliwatts (mW). Multiply the watt value by 1000

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

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 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.

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).

Need to convert in the opposite direction? Visit our Convert Milliwatts to Watts (mW to W) calculator (1 mW = 0.001 W).

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

  • Convert 5 Watts to Milliwatts: Applying the formula (mW = W × 1000): starting with 5 W, multiply the watt value by 1000 to get 5000 mW.
  • Convert 10 Watts to Milliwatts: Applying the formula (mW = W × 1000): starting with 10 W, multiply the watt value by 1000 to get 10000 mW.
  • Convert 50 Watts to Milliwatts: Applying the formula (mW = W × 1000): starting with 50 W, multiply the watt value by 1000 to get 50000 mW.

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 watts to milliwatts.

How many milliwatts are in 1 watt?

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

How do you convert watts to milliwatts?

To convert watts (W) to milliwatts (mW), use the formula: mW = W × 1000. Multiply the watt value by 1000. For example, 10 W equals 10000 mW.

How do I convert back from milliwatts to watts?

To convert in the reverse direction from milliwatts (mW) to watts (W), use the inverse formula: W = mW / 1000. Divide the milliwatt value by 1000 (1 mW = 0.001 W).

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

Both watt and milliwatt measure power. 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. 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).

How many watts are in 1 horsepower?

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