Attowatt is 1e-18 watt units.
Attowatts to Zettawatts Converter — aW to ZW
Convert Attowatt (aW) to Zettawatt (ZW) using the exact conversion factor (1 attowatt = 1e-39 zettawatt). See the formula, worked examples, and conversion table.
Attowatts to Zettawatts 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.
Zettawatt is 1e+21 watt units.
Result = input x 1e-18 / 1e+21.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Attowatts to Zettawatts
Attowatt and Zettawatt 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: Attowatt is 1e-18 watt units, and zettawatt is 1e+21 watt units.
Formula
zettawatts = attowatts × 1e-39
This factor comes from each unit's defined relationship to the category's base unit: 1 attowatt equals 1e-18 base units, and 1 zettawatt equals 1e+21 base units, so dividing one by the other gives the direct attowatt-to-zettawatt factor of 1e-39.
Simple example
1 aW × 1e-39 = 1e-39 ZW
1 attowatt = 1e-39 zettawatts.
Real-world example
120 aW × 1e-39 = 1.2e-37 ZW
120 attowatts = 1.2e-37 zettawatts.
Conversion table
| Attowatt (aW) | Zettawatt (ZW) |
|---|---|
| 1 aW | 1e-39 ZW |
| 5 aW | 5e-39 ZW |
| 12 aW | 1.2e-38 ZW |
| 24 aW | 2.4e-38 ZW |
| 120 aW | 1.2e-37 ZW |
| 240 aW | 2.4e-37 ZW |
Reverse conversion: Zettawatt to Attowatt
1e-39 ZW × 1e+39 = 1 aW
1e-39 zettawatts = 1 attowatts.
attowatts = zettawatts × 1e+39
For a page dedicated to this direction, see Zettawatt to Attowatt.
Understanding the Attowatt (aW)
Attowatt is 1e-18 watt units.
Understanding the Zettawatt (ZW)
Zettawatt is 1e+21 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many zettawatts are in 1 attowatt?
1 attowatt equals 1e-39 zettawatts, using the exact defined conversion factor rather than an estimate.
How do I convert attowatt to zettawatt?
Multiply the attowatt value by 1e-39. The converter above does this instantly to whatever precision you set.
How do I convert zettawatt back to attowatt?
Use the reverse factor: 1 zettawatt equals 1e+39 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 electricity.
What is a zettawatt?
Zettawatt (ZW) is a unit of electricity.
Is the attowatt to zettawatt conversion exact?
Yes. Both attowatt and zettawatt are defined by fixed standards rather than physical artifacts, so the factor of 1e-39 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.