Nanowatt is 1e-9 watt units.
Nanowatts to Attowatts Converter — nW to aW
Convert Nanowatt (nW) to Attowatt (aW) using the exact conversion factor (1 nanowatt = 1,000,000,000 attowatt). See the formula, worked examples, and conversion table.
Nanowatts to Attowatts 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.
Attowatt is 1e-18 watt units.
Result = input x 1e-9 / 1e-18.
Power uses the watt as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Nanowatts to Attowatts
Nanowatt and Attowatt 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 attowatt is 1e-18 watt units.
Formula
attowatts = nanowatts × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 nanowatt equals 1e-9 base units, and 1 attowatt equals 1e-18 base units, so dividing one by the other gives the direct nanowatt-to-attowatt factor of 1000000000.
Simple example
1 nW × 1000000000 = 1,000,000,000 aW
1 nanowatt = 1,000,000,000 attowatts.
Real-world example
100 nW × 1000000000 = 100,000,000,000 aW
100 nanowatts = 100,000,000,000 attowatts.
Conversion table
| Nanowatt (nW) | Attowatt (aW) |
|---|---|
| 1 nW | 1,000,000,000 aW |
| 10 nW | 10,000,000,000 aW |
| 100 nW | 100,000,000,000 aW |
| 500 nW | 500,000,000,000 aW |
| 1,000 nW | 1e+12 aW |
| 5,000 nW | 5e+12 aW |
Reverse conversion: Attowatt to Nanowatt
1 aW × 1e-9 = 1e-9 nW
1 attowatt = 1e-9 nanowatts.
nanowatts = attowatts × 1e-9
For a page dedicated to this direction, see Attowatt to Nanowatt.
Understanding the Nanowatt (nW)
Nanowatt is 1e-9 watt units.
Understanding the Attowatt (aW)
Attowatt is 1e-18 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many attowatts are in 1 nanowatt?
1 nanowatt equals 1,000,000,000 attowatts, using the exact defined conversion factor rather than an estimate.
How do I convert nanowatt to attowatt?
Multiply the nanowatt value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert attowatt back to nanowatt?
Use the reverse factor: 1 attowatt equals 1e-9 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 attowatt?
Attowatt (aW) is a unit of power.
Is the nanowatt to attowatt conversion exact?
Yes. Both nanowatt and attowatt are defined by fixed standards rather than physical artifacts, so the factor of 1000000000 used above is exact to as many digits as you choose to display.