Petawatt is 1000000000000000 watt units.
Petawatts to Exawatts Converter — PW to EW
Convert Petawatt (PW) to Exawatt (EW) using the exact conversion factor (1 petawatt = 0.001 exawatt). See the formula, worked examples, and conversion table.
Petawatts to Exawatts 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.
Exawatt is 1000000000000000000 watt units.
Result = input x 1e+15 / 1e+18.
Power units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Petawatts to Exawatts
Petawatt and Exawatt 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 exawatt is 1000000000000000000 watt units.
Formula
exawatts = petawatts × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 petawatt equals 1e+15 base units, and 1 exawatt equals 1e+18 base units, so dividing one by the other gives the direct petawatt-to-exawatt factor of 0.001.
Simple example
1 PW × 0.001 = 0.001 EW
1 petawatt = 0.001 exawatts.
Real-world example
100 PW × 0.001 = 0.1 EW
100 petawatts = 0.1 exawatts.
Conversion table
| Petawatt (PW) | Exawatt (EW) |
|---|---|
| 1 PW | 0.001 EW |
| 10 PW | 0.01 EW |
| 50 PW | 0.05 EW |
| 100 PW | 0.1 EW |
| 500 PW | 0.5 EW |
| 1,000 PW | 1 EW |
Reverse conversion: Exawatt to Petawatt
0.001 EW × 1000 = 1 PW
0.001 exawatts = 1 petawatt.
petawatts = exawatts × 1000
For a page dedicated to this direction, see Exawatt to Petawatt.
Understanding the Petawatt (PW)
Petawatt is 1000000000000000 watt units.
Understanding the Exawatt (EW)
Exawatt is 1000000000000000000 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many exawatts are in 1 petawatt?
1 petawatt equals 0.001 exawatts, using the exact defined conversion factor rather than an estimate.
How do I convert petawatt to exawatt?
Multiply the petawatt value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert exawatt back to petawatt?
Use the reverse factor: 1 exawatt equals 1,000 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 exawatt?
Exawatt (EW) is a unit of engineering.
Is the petawatt to exawatt conversion exact?
Yes. Both petawatt and exawatt are defined by fixed standards rather than physical artifacts, so the factor of 0.001 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.