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