Petawatt is 1000000000000000 watt units.
Petawatts to Zettawatts Converter — PW to ZW
Convert Petawatt (PW) to Zettawatt (ZW) using the exact conversion factor (1 petawatt = 0.000001 zettawatt). See the formula, worked examples, and conversion table.
Petawatts to Zettawatts 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.
Zettawatt is 1e+21 watt units.
Result = input x 1e+15 / 1e+21.
Power units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Petawatts to Zettawatts
Petawatt and Zettawatt 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: Petawatt is 1000000000000000 watt units, and zettawatt is 1e+21 watt units.
Formula
zettawatts = petawatts × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 petawatt equals 1e+15 base units, and 1 zettawatt equals 1e+21 base units, so dividing one by the other gives the direct petawatt-to-zettawatt factor of 0.000001.
Simple example
1 PW × 0.000001 = 0.000001 ZW
1 petawatt = 0.000001 zettawatts.
Real-world example
100 PW × 0.000001 = 0.0001 ZW
100 petawatts = 0.0001 zettawatts.
Conversion table
| Petawatt (PW) | Zettawatt (ZW) |
|---|---|
| 1 PW | 0.000001 ZW |
| 10 PW | 0.00001 ZW |
| 50 PW | 0.00005 ZW |
| 100 PW | 0.0001 ZW |
| 500 PW | 0.0005 ZW |
| 1,000 PW | 0.001 ZW |
Reverse conversion: Zettawatt to Petawatt
0.000001 ZW × 1000000 = 1 PW
0.000001 zettawatts = 1 petawatt.
petawatts = zettawatts × 1000000
For a page dedicated to this direction, see Zettawatt to Petawatt.
Understanding the Petawatt (PW)
Petawatt is 1000000000000000 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 petawatt?
1 petawatt equals 0.000001 zettawatts, using the exact defined conversion factor rather than an estimate.
How do I convert petawatt to zettawatt?
Multiply the petawatt value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert zettawatt back to petawatt?
Use the reverse factor: 1 zettawatt equals 1,000,000 petawatts. You can also use the swap control in the converter above to flip the direction instantly.
What is a petawatt?
Petawatt (PW) is a unit of engineering.
What is a zettawatt?
Zettawatt (ZW) is a unit of engineering.
Is the petawatt to zettawatt conversion exact?
Yes. Both petawatt and zettawatt 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.
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.