A Milliwatt (mW) equals 1/1,000 watt(s), a scaled unit of electrical power used for milli-scale electrical work.
Milliwatts to Watts
Convert Milliwatt (mW) to Watt (W) instantly with an exact formula, conversion table, and FAQ.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
Electrical calculator
Electricity Converter
Convert milliwatts (mW) to watts (W) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
The watt (W) is the SI unit of power, equal to one joule of energy transferred per second.
W = mW × 0.001
Results update instantly for Milliwatts to Watts conversions.
Reserved above the conversion cards and below the converter.
Formula
W = mW × 0.001
mW = W × 1000
Conversion table
| 1 mW | 0.001 W |
| 5 mW | 0.005 W |
| 10 mW | 0.01 W |
| 20 mW | 0.02 W |
| 50 mW | 0.05 W |
| 100 mW | 0.1 W |
| 500 mW | 0.5 W |
| 1000 mW | 1 W |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both milliwatt and watt measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in milliwatts by 0.001 to get watts. To reverse the conversion, multiply a watt value by 1000 to get back to milliwatts.
Frequently asked questions
What is Milliwatt (mW)?
A Milliwatt (mW) equals 1/1,000 watt(s), a scaled unit of electrical power used for milli-scale electrical work.
What is Watt (W)?
The watt (W) is the SI unit of power, equal to one joule of energy transferred per second.
How do I convert milliwatts to watts?
Multiply the milliwatt value by 0.001 to get the equivalent in watts. For example, 5 mW × 0.001 = 0.005 W.
Is this conversion exact?
Yes. Both units use fixed, defined scale factors, so the factor 0.001 is an exact, non-rounded value.
Can I convert watts back to milliwatts?
Yes. Divide the watt value by 0.001, or multiply it by 1000, to get milliwatts.
Reserved between the FAQ and the article so the page stays balanced.
About converting milliwatts to watts
A Milliwatt (mW) equals 1/1,000 watt(s), a scaled unit of electrical power used for milli-scale electrical work. The watt (W) is the SI unit of power, equal to one joule of energy transferred per second.
Use this calculator to move between milliwatts and watts accurately for homework, engineering, billing, or everyday electricity calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.