Petajoule is 1000000000000000 joule units.
Petajoules to Exajoules Converter — PJ to EJ
Convert Petajoule (PJ) to Exajoule (EJ) using the exact conversion factor (1 petajoule = 0.001 exajoule). See the formula, worked examples, and conversion table.
Petajoules to Exajoules converter
Converter
Energy Converter
Convert joules, calories, kilowatt-hours, BTU, electronvolts, therms, and mechanical work units.
Context values
Some unit families need one extra value for a physically accurate result.
Exajoule is 1000000000000000000 joule units.
Result = input x 1e+15 / 1e+18.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Petajoules to Exajoules
Petajoule and Exajoule both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Petajoule is 1000000000000000 joule units, and exajoule is 1000000000000000000 joule units.
Formula
exajoules = petajoules × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 petajoule equals 1e+15 base units, and 1 exajoule equals 1e+18 base units, so dividing one by the other gives the direct petajoule-to-exajoule factor of 0.001.
Simple example
1 PJ × 0.001 = 0.001 EJ
1 petajoule = 0.001 exajoules.
Real-world example
100 PJ × 0.001 = 0.1 EJ
100 petajoules = 0.1 exajoules.
Conversion table
| Petajoule (PJ) | Exajoule (EJ) |
|---|---|
| 1 PJ | 0.001 EJ |
| 10 PJ | 0.01 EJ |
| 100 PJ | 0.1 EJ |
| 500 PJ | 0.5 EJ |
| 1,000 PJ | 1 EJ |
| 2,000 PJ | 2 EJ |
Reverse conversion: Exajoule to Petajoule
0.001 EJ × 1000 = 1 PJ
0.001 exajoules = 1 petajoule.
petajoules = exajoules × 1000
For a page dedicated to this direction, see Exajoule to Petajoule.
Understanding the Petajoule (PJ)
Petajoule is 1000000000000000 joule units.
Understanding the Exajoule (EJ)
Exajoule is 1000000000000000000 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many exajoules are in 1 petajoule?
1 petajoule equals 0.001 exajoules, using the exact defined conversion factor rather than an estimate.
How do I convert petajoule to exajoule?
Multiply the petajoule value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert exajoule back to petajoule?
Use the reverse factor: 1 exajoule equals 1,000 petajoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a petajoule?
Petajoule (PJ) is a unit of energy.
What is a exajoule?
Exajoule (EJ) is a unit of energy.
Is the petajoule to exajoule conversion exact?
Yes. Both petajoule and exajoule 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.