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