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
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.
Attowatt is 1e-18 watt units.
Result = input x 1e-24 / 1e-18.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Yoctowatts to Attowatts
Yoctowatt and Attowatt 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: 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
120 yW × 0.000001 = 0.00012 aW
120 yoctowatts = 0.00012 attowatts.
Conversion table
| Yoctowatt (yW) | Attowatt (aW) |
|---|---|
| 1 yW | 0.000001 aW |
| 5 yW | 0.000005 aW |
| 12 yW | 0.000012 aW |
| 24 yW | 0.000024 aW |
| 120 yW | 0.00012 aW |
| 240 yW | 0.00024 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 electricity.
What is a attowatt?
Attowatt (aW) is a unit of electricity.
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.
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.