Nanowatt is 1e-9 watt units.
Nanowatts to Terawatts Converter — nW to TW
Convert Nanowatt (nW) to Terawatt (TW) using the exact conversion factor (1 nanowatt = 1e-21 terawatt). See the formula, worked examples, and conversion table.
Nanowatts to Terawatts 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.
Terawatt is 1000000000000 watt units.
Result = input x 1e-9 / 1e+12.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Nanowatts to Terawatts
Nanowatt and Terawatt 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 terawatt is 1000000000000 watt units.
Formula
terawatts = nanowatts × 1e-21
This factor comes from each unit's defined relationship to the category's base unit: 1 nanowatt equals 1e-9 base units, and 1 terawatt equals 1e+12 base units, so dividing one by the other gives the direct nanowatt-to-terawatt factor of 1e-21.
Simple example
1 nW × 1e-21 = 1e-21 TW
1 nanowatt = 1e-21 terawatts.
Real-world example
120 nW × 1e-21 = 1.2e-19 TW
120 nanowatts = 1.2e-19 terawatts.
Conversion table
| Nanowatt (nW) | Terawatt (TW) |
|---|---|
| 1 nW | 1e-21 TW |
| 5 nW | 5e-21 TW |
| 12 nW | 1.2e-20 TW |
| 24 nW | 2.4e-20 TW |
| 120 nW | 1.2e-19 TW |
| 240 nW | 2.4e-19 TW |
Reverse conversion: Terawatt to Nanowatt
1e-21 TW × 1e+21 = 1 nW
1e-21 terawatts = 1 nanowatts.
nanowatts = terawatts × 1e+21
For a page dedicated to this direction, see Terawatt to Nanowatt.
Understanding the Nanowatt (nW)
Nanowatt is 1e-9 watt units.
Understanding the Terawatt (TW)
Terawatt is 1000000000000 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many terawatts are in 1 nanowatt?
1 nanowatt equals 1e-21 terawatts, using the exact defined conversion factor rather than an estimate.
How do I convert nanowatt to terawatt?
Multiply the nanowatt value by 1e-21. The converter above does this instantly to whatever precision you set.
How do I convert terawatt back to nanowatt?
Use the reverse factor: 1 terawatt equals 1e+21 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 terawatt?
Terawatt (TW) is a unit of electricity.
Is the nanowatt to terawatt conversion exact?
Yes. Both nanowatt and terawatt are defined by fixed standards rather than physical artifacts, so the factor of 1e-21 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.