Nanowatt is 1e-9 watt units.
Nanowatts to Gigawatts Converter — nW to GW
Convert Nanowatt (nW) to Gigawatt (GW) using the exact conversion factor (1 nanowatt = 1e-18 gigawatt). See the formula, worked examples, and conversion table.
Nanowatts to Gigawatts 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.
Gigawatt is 1000000000 watt units.
Result = input x 1e-9 / 1e+9.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Nanowatts to Gigawatts
Nanowatt and Gigawatt 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 gigawatt is 1000000000 watt units.
Formula
gigawatts = nanowatts × 1e-18
This factor comes from each unit's defined relationship to the category's base unit: 1 nanowatt equals 1e-9 base units, and 1 gigawatt equals 1000000000 base units, so dividing one by the other gives the direct nanowatt-to-gigawatt factor of 1e-18.
Simple example
1 nW × 1e-18 = 1e-18 GW
1 nanowatt = 1e-18 gigawatts.
Real-world example
120 nW × 1e-18 = 1.2e-16 GW
120 nanowatts = 1.2e-16 gigawatts.
Conversion table
| Nanowatt (nW) | Gigawatt (GW) |
|---|---|
| 1 nW | 1e-18 GW |
| 5 nW | 5e-18 GW |
| 12 nW | 1.2e-17 GW |
| 24 nW | 2.4e-17 GW |
| 120 nW | 1.2e-16 GW |
| 240 nW | 2.4e-16 GW |
Reverse conversion: Gigawatt to Nanowatt
1e-18 GW × 1e+18 = 1 nW
1e-18 gigawatts = 1 nanowatt.
nanowatts = gigawatts × 1e+18
For a page dedicated to this direction, see Gigawatt to Nanowatt.
Understanding the Nanowatt (nW)
Nanowatt is 1e-9 watt units.
Understanding the Gigawatt (GW)
Gigawatt is 1000000000 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gigawatts are in 1 nanowatt?
1 nanowatt equals 1e-18 gigawatts, using the exact defined conversion factor rather than an estimate.
How do I convert nanowatt to gigawatt?
Multiply the nanowatt value by 1e-18. The converter above does this instantly to whatever precision you set.
How do I convert gigawatt back to nanowatt?
Use the reverse factor: 1 gigawatt equals 1e+18 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 gigawatt?
Gigawatt (GW) is a unit of electricity.
Is the nanowatt to gigawatt conversion exact?
Yes. Both nanowatt and gigawatt are defined by fixed standards rather than physical artifacts, so the factor of 1e-18 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.