Petajoule is 1000000000000000 joule units.
Petajoules to Zettajoules Converter — PJ to ZJ
Convert Petajoule (PJ) to Zettajoule (ZJ) using the exact conversion factor (1 petajoule = 0.000001 zettajoule). See the formula, worked examples, and conversion table.
Petajoules to Zettajoules 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.
Zettajoule is 1e+21 joule units.
Result = input x 1e+15 / 1e+21.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Petajoules to Zettajoules
Petajoule and Zettajoule 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 zettajoule is 1e+21 joule units.
Formula
zettajoules = petajoules × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 petajoule equals 1e+15 base units, and 1 zettajoule equals 1e+21 base units, so dividing one by the other gives the direct petajoule-to-zettajoule factor of 0.000001.
Simple example
1 PJ × 0.000001 = 0.000001 ZJ
1 petajoule = 0.000001 zettajoules.
Real-world example
100 PJ × 0.000001 = 0.0001 ZJ
100 petajoules = 0.0001 zettajoules.
Conversion table
| Petajoule (PJ) | Zettajoule (ZJ) |
|---|---|
| 1 PJ | 0.000001 ZJ |
| 10 PJ | 0.00001 ZJ |
| 100 PJ | 0.0001 ZJ |
| 500 PJ | 0.0005 ZJ |
| 1,000 PJ | 0.001 ZJ |
| 2,000 PJ | 0.002 ZJ |
Reverse conversion: Zettajoule to Petajoule
0.000001 ZJ × 1000000 = 1 PJ
0.000001 zettajoules = 1 petajoule.
petajoules = zettajoules × 1000000
For a page dedicated to this direction, see Zettajoule to Petajoule.
Understanding the Petajoule (PJ)
Petajoule is 1000000000000000 joule units.
Understanding the Zettajoule (ZJ)
Zettajoule is 1e+21 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many zettajoules are in 1 petajoule?
1 petajoule equals 0.000001 zettajoules, using the exact defined conversion factor rather than an estimate.
How do I convert petajoule to zettajoule?
Multiply the petajoule value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert zettajoule back to petajoule?
Use the reverse factor: 1 zettajoule equals 1,000,000 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 zettajoule?
Zettajoule (ZJ) is a unit of energy.
Is the petajoule to zettajoule conversion exact?
Yes. Both petajoule and zettajoule 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.