Nanowatt is 1e-9 watt units.
Nanowatts to Milliwatts Converter — nW to mW
Convert Nanowatt (nW) to Milliwatt (mW) using the exact conversion factor (1 nanowatt = 0.000001 milliwatt). See the formula, worked examples, and conversion table.
Nanowatts to Milliwatts converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Milliwatt is 0.001 watt units.
Result = input x 1e-9 / 0.001.
Power units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Nanowatts to Milliwatts
Nanowatt and Milliwatt both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Nanowatt is 1e-9 watt units, and milliwatt is 0.001 watt units.
Formula
milliwatts = nanowatts × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 nanowatt equals 1e-9 base units, and 1 milliwatt equals 0.001 base units, so dividing one by the other gives the direct nanowatt-to-milliwatt factor of 0.000001.
Simple example
1 nW × 0.000001 = 0.000001 mW
1 nanowatt = 0.000001 milliwatts.
Real-world example
100 nW × 0.000001 = 0.0001 mW
100 nanowatts = 0.0001 milliwatts.
Conversion table
| Nanowatt (nW) | Milliwatt (mW) |
|---|---|
| 1 nW | 0.000001 mW |
| 10 nW | 0.00001 mW |
| 50 nW | 0.00005 mW |
| 100 nW | 0.0001 mW |
| 500 nW | 0.0005 mW |
| 1,000 nW | 0.001 mW |
Reverse conversion: Milliwatt to Nanowatt
0.000001 mW × 1000000 = 1 nW
0.000001 milliwatts = 1 nanowatt.
nanowatts = milliwatts × 1000000
For a page dedicated to this direction, see Milliwatt to Nanowatt.
Understanding the Nanowatt (nW)
Nanowatt is 1e-9 watt units.
Understanding the Milliwatt (mW)
Milliwatt is 0.001 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many milliwatts are in 1 nanowatt?
1 nanowatt equals 0.000001 milliwatts, using the exact defined conversion factor rather than an estimate.
How do I convert nanowatt to milliwatt?
Multiply the nanowatt value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert milliwatt back to nanowatt?
Use the reverse factor: 1 milliwatt equals 1,000,000 nanowatts. You can also use the swap control in the converter above to flip the direction instantly.
What is a nanowatt?
Nanowatt (nW) is a unit of engineering.
What is a milliwatt?
Milliwatt (mW) is a unit of engineering.
Is the nanowatt to milliwatt conversion exact?
Yes. Both nanowatt and milliwatt are defined by fixed standards rather than physical artifacts, so the factor of 0.000001 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.