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
Power Converter
Convert watts, horsepower, refrigeration tons, BTU per hour, and engineering power units.
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 uses the watt as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Nanowatts to Milliwatts
Nanowatt and Milliwatt both describe power output, and the conversion is a routine part of comparing an engine or motor's spec sheet across countries that use different power units. 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 |
| 100 nW | 0.0001 mW |
| 500 nW | 0.0005 mW |
| 1,000 nW | 0.001 mW |
| 5,000 nW | 0.005 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 power.
What is a milliwatt?
Milliwatt (mW) is a unit of power.
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.