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
Electricity Converter
Convert electrical units by family and calculate voltage, current, resistance, power, and energy with context values.
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.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Nanowatts to Milliwatts
Nanowatt and Milliwatt both belong to the electricity family — voltage, current, resistance, power, or energy — units that show up constantly when working across the different standards used by household wiring (120V/240V depending on region), automotive electrical systems (12V/24V), and electronics design. 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
120 nW × 0.000001 = 0.00012 mW
120 nanowatts = 0.00012 milliwatts.
Conversion table
| Nanowatt (nW) | Milliwatt (mW) |
|---|---|
| 1 nW | 0.000001 mW |
| 5 nW | 0.000005 mW |
| 12 nW | 0.000012 mW |
| 24 nW | 0.000024 mW |
| 120 nW | 0.00012 mW |
| 240 nW | 0.00024 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 electricity.
What is a milliwatt?
Milliwatt (mW) is a unit of electricity.
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.
What's the difference between voltage, current, and resistance?
Voltage (volts) is the electrical potential difference driving current through a circuit. Current (amperes) is the rate of flow of electric charge. Resistance (ohms) is how much a component opposes that flow. They're related by Ohm's law (V = I × R), but they are distinct physical quantities, and this page converts between units of just one of them.