Milliwatt to Watt Converter
Power · unit-converter
Convert Milliwatt to Watt with a fixed input and output unit, step-by-step formula line, and reference tables. Linear units use SI watt definitions; mechanical hp uses 550 ft·lbf/s; BTU/h uses the IT BTU; dBm/dBW are logarithmic relative to 1 mW and 1 W. The full Power Converter also includes PS/CV, TR, kVA/MVA, and ft·lb/s.
Calculator
From: Milliwatt (mw)
To: Watt (w)
About Milliwatt
One milliwatt is one thousandth of a watt. Common in RF, fiber optics, and low-power electronics.
About Watt
The watt is the SI unit of power (one joule per second). All linear units in this converter are defined by a fixed watt equivalent.
How to convert milliwatts to watts
1 milliwatt is equal to 0.001 watt when both are expressed in watt-equivalents:
1 mw = (0.001 W ÷ 1 W) w = 0.001 w
Each milliwatt is defined as 0.001 W and each watt as 1 W in this tool, so one mw equals 0.001 ÷ 1 w = 0.001 w.
Let d(mw) be the numeric value in Milliwatt (mw), and d(w) the value in Watt (w). Then:
d(w) = d(mw) × (0.001 / 1)
Equivalently, divide by how many mw fit into one w (watts per w divided by watts per mw):
d(w) = d(mw) ÷ 1000
Or: watt = milliwatt ÷ 1000
Examples
Example #1: Convert 1 mw to watt
1 mw = 1 mw × (0.001/1) w = 0.001 w
1 mw = 1 mw ÷ 1000 = 0.001 w
Intermediate watts: 0.001 W
Example #2: Convert 10 mw to watt
10 mw = 10 mw × (0.001/1) w = 0.01 w
10 mw = 10 mw ÷ 1000 = 0.01 w
Intermediate watts: 0.01 W
Summary
To convert Milliwatt to Watt, multiply the value in mw by the ratio of watts per mw divided by watts per w. Equivalently: value_w = value_mw × (0.001 / 1). Numerically, 1 mw equals 0.001 w.
Relationship context
Both units are SI / decimal power (watts and prefixes). Conversions use fixed watt factors, so results stay consistent with the definitions in this converter. The factor from Milliwatt to Watt is 1.000000e-3 (1 mw = 0.001 w).
Conversion tables
| Milliwatt (mw) | Watt (w) |
|---|---|
| 0.1 | 0.0001 |
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 4 | 0.004 |
| 5 | 0.005 |
| 6 | 0.006 |
| 7 | 0.007 |
| 8 | 0.008 |
| 9 | 0.009 |
| Milliwatt (mw) | Watt (w) |
|---|---|
| 10 | 0.01 |
| 20 | 0.02 |
| 30 | 0.03 |
| 40 | 0.04 |
| 50 | 0.05 |
| 60 | 0.06 |
| 70 | 0.07 |
| 80 | 0.08 |
| 90 | 0.09 |
| 100 | 0.1 |