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
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
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 units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Nanowatts to Attowatts
Nanowatt and Attowatt both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. 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 |
| 50 nW | 50,000,000,000 aW |
| 100 nW | 100,000,000,000 aW |
| 500 nW | 500,000,000,000 aW |
| 1,000 nW | 1e+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 engineering.
What is a attowatt?
Attowatt (aW) is a unit of engineering.
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.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.