Milliwatt (mW)
A milliwatt is one thousandth of a watt — a scale for low-power electronics and optical signals.
Milliwatts describe laser pointers, radio transmitters, and microcontroller power draw.
Milliwatt to Watt
Convert milliwatt to watt instantly. Type in either field — results update live.
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Power Milliwatt Watt
1 milliwatt = 0.001 watts
Unit
Unit
Conversion table
Selected mW values converted to W using the exact factor from this tool.
| mW | W |
|---|---|
| 0.01 | 0.00001 |
| 0.1 | 0.0001 |
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 50 | 0.05 |
| 100 | 0.1 |
| 1,000 | 1 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 mW = 0.001 W
1 W = 1000 mW
To convert milliwatt to watt, multiply by 0.001.
To convert watt to milliwatt, multiply by 1000.
Example: convert 10 mW to W
10 × 0.001 = 0.01 W
About these units
Short background on the units used in this conversion.
Watt (W)
The watt is the SI unit of power — one joule of energy transferred per second.
Watts rate light bulbs, appliance nameplates, solar panels, and electrical device consumption.
Frequently asked questions
How many watts are in one milliwatt?
One milliwatt equals 0.001 watts. Multiply your milliwatts value by 0.001 to convert to watts.
What is the conversion formula?
W = mW × 0.001The reverse is
mW = W × 1,000, using the same exact factors as this converter.Is this Milliwatt to Watt converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.
All milliwatt conversions
Jump to any power conversion starting from milliwatt — including the reverse direction and every other unit in our dataset.
watt (W) → milliwatt (mW)
milliwatt (mW) → kilowatt (kW)milliwatt (mW) → megawatt (MW)milliwatt (mW) → gigawatt (GW)milliwatt (mW) → horsepower (mechanical / uk) (hp)milliwatt (mW) → horsepower (metric) (metric hp)milliwatt (mW) → horsepower (electric) (hp (electric))milliwatt (mW) → british thermal unit (it) per hour (Btu/h)milliwatt (mW) → ton (refrigeration) (TR)milliwatt (mW) → exawatt (EW)milliwatt (mW) → petawatt (PW)milliwatt (mW) → terawatt (TW)milliwatt (mW) → hectowatt (hW)milliwatt (mW) → dekawatt (daW)milliwatt (mW) → deciwatt (dW)milliwatt (mW) → centiwatt (cW)milliwatt (mW) → microwatt (µW)milliwatt (mW) → nanowatt (nW)milliwatt (mW) → picowatt (pW)milliwatt (mW) → femtowatt (fW)milliwatt (mW) → attowatt (aW)milliwatt (mW) → horsepower (550 ft·lbf/s) (hp)milliwatt (mW) → horsepower (boiler) (hp (boiler))milliwatt (mW) → horsepower (water) (hp (water))milliwatt (mW) → pferdestärke (ps) (PS)milliwatt (mW) → british thermal unit (it) per minute (Btu/min)milliwatt (mW) → british thermal unit (it) per second (Btu/s)milliwatt (mW) → british thermal unit (thermochemical) per hour (Btu (th)/h)milliwatt (mW) → british thermal unit (thermochemical) per minute (Btu (th)/min)milliwatt (mW) → british thermal unit (thermochemical) per second (Btu (th)/s)milliwatt (mW) → mega british thermal unit (it) per hour (MBtu/h)milliwatt (mW) → mbh (thousand btu per hour)milliwatt (mW) → kilocalorie (it) per hour (kcal/h)milliwatt (mW) → kilocalorie (it) per minute (kcal/min)milliwatt (mW) → kilocalorie (it) per second (kcal/s)milliwatt (mW) → kilocalorie (thermochemical) per hour (kcal (th)/h)milliwatt (mW) → kilocalorie (thermochemical) per minute (kcal (th)/min)milliwatt (mW) → kilocalorie (thermochemical) per second (kcal (th)/s)milliwatt (mW) → calorie (it) per hour (cal/h)milliwatt (mW) → calorie (it) per minute (cal/min)milliwatt (mW) → calorie (it) per second (cal/s)milliwatt (mW) → calorie (thermochemical) per hour (cal (th)/h)milliwatt (mW) → calorie (thermochemical) per minute (cal (th)/min)milliwatt (mW) → calorie (thermochemical) per second (cal (th)/s)milliwatt (mW) → foot pound-force per hour (ft·lbf/h)milliwatt (mW) → foot pound-force per minute (ft·lbf/min)milliwatt (mW) → foot pound-force per second (ft·lbf/s)milliwatt (mW) → pound-foot per hour (lbf·ft/h)milliwatt (mW) → pound-foot per minute (lbf·ft/min)milliwatt (mW) → pound-foot per second (lbf·ft/s)milliwatt (mW) → erg per second (erg/s)milliwatt (mW) → kilovolt ampere (kV·A)milliwatt (mW) → volt ampere (V·A)milliwatt (mW) → newton meter per second (N·m/s)milliwatt (mW) → joule per second (J/s)milliwatt (mW) → exajoule per second (EJ/s)milliwatt (mW) → petajoule per second (PJ/s)milliwatt (mW) → terajoule per second (TJ/s)milliwatt (mW) → gigajoule per second (GJ/s)milliwatt (mW) → megajoule per second (MJ/s)milliwatt (mW) → kilojoule per second (kJ/s)milliwatt (mW) → hectojoule per second (hJ/s)milliwatt (mW) → dekajoule per second (daJ/s)milliwatt (mW) → decijoule per second (dJ/s)milliwatt (mW) → centijoule per second (cJ/s)milliwatt (mW) → millijoule per second (mJ/s)milliwatt (mW) → microjoule per second (µJ/s)milliwatt (mW) → nanojoule per second (nJ/s)milliwatt (mW) → picojoule per second (pJ/s)milliwatt (mW) → femtojoule per second (fJ/s)milliwatt (mW) → attojoule per second (aJ/s)milliwatt (mW) → joule per hour (J/h)milliwatt (mW) → joule per minute (J/min)milliwatt (mW) → kilojoule per hour (kJ/h)milliwatt (mW) → kilojoule per minute (kJ/min)