Terajoule is 1000000000000 joule units.
Terajoules to Petajoules Converter — TJ to PJ
Convert Terajoule (TJ) to Petajoule (PJ) using the exact conversion factor (1 terajoule = 0.001 petajoule). See the formula, worked examples, and conversion table.
Terajoules to Petajoules 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.
Petajoule is 1000000000000000 joule units.
Result = input x 1e+12 / 1e+15.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Terajoules to Petajoules
Terajoule and Petajoule 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: Terajoule is 1000000000000 joule units, and petajoule is 1000000000000000 joule units.
Formula
petajoules = terajoules × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 terajoule equals 1e+12 base units, and 1 petajoule equals 1e+15 base units, so dividing one by the other gives the direct terajoule-to-petajoule factor of 0.001.
Simple example
1 TJ × 0.001 = 0.001 PJ
1 terajoule = 0.001 petajoules.
Real-world example
100 TJ × 0.001 = 0.1 PJ
100 terajoules = 0.1 petajoules.
Conversion table
| Terajoule (TJ) | Petajoule (PJ) |
|---|---|
| 1 TJ | 0.001 PJ |
| 10 TJ | 0.01 PJ |
| 50 TJ | 0.05 PJ |
| 100 TJ | 0.1 PJ |
| 500 TJ | 0.5 PJ |
| 1,000 TJ | 1 PJ |
Reverse conversion: Petajoule to Terajoule
0.001 PJ × 1000 = 1 TJ
0.001 petajoules = 1 terajoule.
terajoules = petajoules × 1000
For a page dedicated to this direction, see Petajoule to Terajoule.
Understanding the Terajoule (TJ)
Terajoule is 1000000000000 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 terajoule?
1 terajoule equals 0.001 petajoules, using the exact defined conversion factor rather than an estimate.
How do I convert terajoule to petajoule?
Multiply the terajoule value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert petajoule back to terajoule?
Use the reverse factor: 1 petajoule equals 1,000 terajoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a terajoule?
Terajoule (TJ) is a unit of engineering.
What is a petajoule?
Petajoule (PJ) is a unit of engineering.
Is the terajoule to petajoule conversion exact?
Yes. Both terajoule and petajoule 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.