Attowatt is 1e-18 watt units.
Attowatts to Yoctowatts Converter — aW to yW
Convert Attowatt (aW) to Yoctowatt (yW) using the exact conversion factor (1 attowatt = 1,000,000 yoctowatt). See the formula, worked examples, and conversion table.
Attowatts to Yoctowatts 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.
Yoctowatt is 1e-24 watt units.
Result = input x 1e-18 / 1e-24.
Power units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Attowatts to Yoctowatts
Attowatt and Yoctowatt 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: Attowatt is 1e-18 watt units, and yoctowatt is 1e-24 watt units.
Formula
yoctowatts = attowatts × 1000000
This factor comes from each unit's defined relationship to the category's base unit: 1 attowatt equals 1e-18 base units, and 1 yoctowatt equals 1e-24 base units, so dividing one by the other gives the direct attowatt-to-yoctowatt factor of 1000000.
Simple example
1 aW × 1000000 = 1,000,000 yW
1 attowatt = 1,000,000 yoctowatts.
Real-world example
100 aW × 1000000 = 100,000,000 yW
100 attowatts = 100,000,000 yoctowatts.
Conversion table
| Attowatt (aW) | Yoctowatt (yW) |
|---|---|
| 1 aW | 1,000,000 yW |
| 10 aW | 10,000,000 yW |
| 50 aW | 50,000,000 yW |
| 100 aW | 100,000,000 yW |
| 500 aW | 500,000,000 yW |
| 1,000 aW | 1,000,000,000 yW |
Reverse conversion: Yoctowatt to Attowatt
1 yW × 0.000001 = 0.000001 aW
1 yoctowatt = 0.000001 attowatts.
attowatts = yoctowatts × 0.000001
For a page dedicated to this direction, see Yoctowatt to Attowatt.
Understanding the Attowatt (aW)
Attowatt is 1e-18 watt units.
Understanding the Yoctowatt (yW)
Yoctowatt is 1e-24 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many yoctowatts are in 1 attowatt?
1 attowatt equals 1,000,000 yoctowatts, using the exact defined conversion factor rather than an estimate.
How do I convert attowatt to yoctowatt?
Multiply the attowatt value by 1000000. The converter above does this instantly to whatever precision you set.
How do I convert yoctowatt back to attowatt?
Use the reverse factor: 1 yoctowatt equals 0.000001 attowatts. You can also use the swap control in the converter above to flip the direction instantly.
What is a attowatt?
Attowatt (aW) is a unit of engineering.
What is a yoctowatt?
Yoctowatt (yW) is a unit of engineering.
Is the attowatt to yoctowatt conversion exact?
Yes. Both attowatt and yoctowatt are defined by fixed standards rather than physical artifacts, so the factor of 1000000 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.