Petawatt is 1000000000000000 watt units.
Petawatts to Zeptowatts Converter — PW to zW
Convert Petawatt (PW) to Zeptowatt (zW) using the exact conversion factor (1 petawatt = 1e+36 zeptowatt). See the formula, worked examples, and conversion table.
Petawatts to Zeptowatts 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.
Zeptowatt 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 Zeptowatts
Petawatt and Zeptowatt 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 zeptowatt is 1e-21 watt units.
Formula
zeptowatts = petawatts × 1e+36
This factor comes from each unit's defined relationship to the category's base unit: 1 petawatt equals 1e+15 base units, and 1 zeptowatt equals 1e-21 base units, so dividing one by the other gives the direct petawatt-to-zeptowatt factor of 1e+36.
Simple example
1 PW × 1e+36 = 1e+36 zW
1 petawatt = 1e+36 zeptowatts.
Real-world example
100 PW × 1e+36 = 1e+38 zW
100 petawatts = 1e+38 zeptowatts.
Conversion table
| Petawatt (PW) | Zeptowatt (zW) |
|---|---|
| 1 PW | 1e+36 zW |
| 10 PW | 1e+37 zW |
| 50 PW | 5e+37 zW |
| 100 PW | 1e+38 zW |
| 500 PW | 5e+38 zW |
| 1,000 PW | 1e+39 zW |
Reverse conversion: Zeptowatt to Petawatt
1e+36 zW × 1e-36 = 1 PW
1e+36 zeptowatts = 1 petawatt.
petawatts = zeptowatts × 1e-36
For a page dedicated to this direction, see Zeptowatt to Petawatt.
Understanding the Petawatt (PW)
Petawatt is 1000000000000000 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 petawatt?
1 petawatt equals 1e+36 zeptowatts, using the exact defined conversion factor rather than an estimate.
How do I convert petawatt to zeptowatt?
Multiply the petawatt value by 1e+36. The converter above does this instantly to whatever precision you set.
How do I convert zeptowatt back to petawatt?
Use the reverse factor: 1 zeptowatt equals 1e-36 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 zeptowatt?
Zeptowatt (zW) is a unit of engineering.
Is the petawatt to zeptowatt conversion exact?
Yes. Both petawatt and zeptowatt are defined by fixed standards rather than physical artifacts, so the factor of 1e+36 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.