Exawatt is 1000000000000000000 watt units.
Exawatts to Zeptowatts Converter — EW to zW
Convert Exawatt (EW) to Zeptowatt (zW) using the exact conversion factor (1 exawatt = 1e+39 zeptowatt). See the formula, worked examples, and conversion table.
Exawatts to Zeptowatts 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.
Zeptowatt is 1e-21 watt units.
Result = input x 1e+18 / 1e-21.
Power uses the watt as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Exawatts to Zeptowatts
Exawatt and Zeptowatt 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: Exawatt is 1000000000000000000 watt units, and zeptowatt is 1e-21 watt units.
Formula
zeptowatts = exawatts × 1e+39
This factor comes from each unit's defined relationship to the category's base unit: 1 exawatt equals 1e+18 base units, and 1 zeptowatt equals 1e-21 base units, so dividing one by the other gives the direct exawatt-to-zeptowatt factor of 1e+39.
Simple example
1 EW × 1e+39 = 1e+39 zW
1 exawatt = 1e+39 zeptowatts.
Real-world example
100 EW × 1e+39 = 1e+41 zW
100 exawatts = 1e+41 zeptowatts.
Conversion table
| Exawatt (EW) | Zeptowatt (zW) |
|---|---|
| 1 EW | 1e+39 zW |
| 10 EW | 1e+40 zW |
| 100 EW | 1e+41 zW |
| 500 EW | 5e+41 zW |
| 1,000 EW | 1e+42 zW |
| 5,000 EW | 5e+42 zW |
Reverse conversion: Zeptowatt to Exawatt
1e+39 zW × 1e-39 = 1 EW
1e+39 zeptowatts = 1 exawatts.
exawatts = zeptowatts × 1e-39
For a page dedicated to this direction, see Zeptowatt to Exawatt.
Understanding the Exawatt (EW)
Exawatt is 1000000000000000000 watt units.
Understanding the Zeptowatt (zW)
Zeptowatt is 1e-21 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many zeptowatts are in 1 exawatt?
1 exawatt equals 1e+39 zeptowatts, using the exact defined conversion factor rather than an estimate.
How do I convert exawatt to zeptowatt?
Multiply the exawatt value by 1e+39. The converter above does this instantly to whatever precision you set.
How do I convert zeptowatt back to exawatt?
Use the reverse factor: 1 zeptowatt equals 1e-39 exawatts. You can also use the swap control in the converter above to flip the direction instantly.
What is a exawatt?
Exawatt (EW) is a unit of power.
What is a zeptowatt?
Zeptowatt (zW) is a unit of power.
Is the exawatt to zeptowatt conversion exact?
Yes. Both exawatt and zeptowatt 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.