Yoctowatt is 1e-24 watt units.
Yoctowatts to Attowatts Converter — yW to aW
Convert Yoctowatt (yW) to Attowatt (aW) using the exact conversion factor (1 yoctowatt = 0.000001 attowatt). See the formula, worked examples, and conversion table.
Yoctowatts 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-24 / 1e-18.
Power uses the watt as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Yoctowatts to Attowatts
Yoctowatt 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: Yoctowatt is 1e-24 watt units, and attowatt is 1e-18 watt units.
Formula
attowatts = yoctowatts × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 yoctowatt equals 1e-24 base units, and 1 attowatt equals 1e-18 base units, so dividing one by the other gives the direct yoctowatt-to-attowatt factor of 0.000001.
Simple example
1 yW × 0.000001 = 0.000001 aW
1 yoctowatt = 0.000001 attowatts.
Real-world example
100 yW × 0.000001 = 0.0001 aW
100 yoctowatts = 0.0001 attowatts.
Conversion table
| Yoctowatt (yW) | Attowatt (aW) |
|---|---|
| 1 yW | 0.000001 aW |
| 10 yW | 0.00001 aW |
| 100 yW | 0.0001 aW |
| 500 yW | 0.0005 aW |
| 1,000 yW | 0.001 aW |
| 5,000 yW | 0.005 aW |
Reverse conversion: Attowatt to Yoctowatt
0.000001 aW × 1000000 = 1 yW
0.000001 attowatts = 1 yoctowatts.
yoctowatts = attowatts × 1000000
For a page dedicated to this direction, see Attowatt to Yoctowatt.
Understanding the Yoctowatt (yW)
Yoctowatt is 1e-24 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 yoctowatt?
1 yoctowatt equals 0.000001 attowatts, using the exact defined conversion factor rather than an estimate.
How do I convert yoctowatt to attowatt?
Multiply the yoctowatt value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert attowatt back to yoctowatt?
Use the reverse factor: 1 attowatt equals 1,000,000 yoctowatts. You can also use the swap control in the converter above to flip the direction instantly.
What is a yoctowatt?
Yoctowatt (yW) is a unit of power.
What is a attowatt?
Attowatt (aW) is a unit of power.
Is the yoctowatt to attowatt conversion exact?
Yes. Both yoctowatt and attowatt are defined by fixed standards rather than physical artifacts, so the factor of 0.000001 used above is exact to as many digits as you choose to display.