Picojoule is 1e-12 joule units.
Picojoules to Nanojoules Converter — pJ to nJ
Convert Picojoule (pJ) to Nanojoule (nJ) using the exact conversion factor (1 picojoule = 0.001 nanojoule). See the formula, worked examples, and conversion table.
Picojoules to Nanojoules 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.
Nanojoule is 1e-9 joule units.
Result = input x 1e-12 / 1e-9.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Picojoules to Nanojoules
Picojoule and Nanojoule 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: Picojoule is 1e-12 joule units, and nanojoule is 1e-9 joule units.
Formula
nanojoules = picojoules × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 picojoule equals 1e-12 base units, and 1 nanojoule equals 1e-9 base units, so dividing one by the other gives the direct picojoule-to-nanojoule factor of 0.001.
Simple example
1 pJ × 0.001 = 0.001 nJ
1 picojoule = 0.001 nanojoules.
Real-world example
100 pJ × 0.001 = 0.1 nJ
100 picojoules = 0.1 nanojoules.
Conversion table
| Picojoule (pJ) | Nanojoule (nJ) |
|---|---|
| 1 pJ | 0.001 nJ |
| 10 pJ | 0.01 nJ |
| 50 pJ | 0.05 nJ |
| 100 pJ | 0.1 nJ |
| 500 pJ | 0.5 nJ |
| 1,000 pJ | 1 nJ |
Reverse conversion: Nanojoule to Picojoule
0.001 nJ × 1000 = 1 pJ
0.001 nanojoules = 1 picojoules.
picojoules = nanojoules × 1000
For a page dedicated to this direction, see Nanojoule to Picojoule.
Understanding the Picojoule (pJ)
Picojoule is 1e-12 joule units.
Understanding the Nanojoule (nJ)
Nanojoule is 1e-9 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many nanojoules are in 1 picojoule?
1 picojoule equals 0.001 nanojoules, using the exact defined conversion factor rather than an estimate.
How do I convert picojoule to nanojoule?
Multiply the picojoule value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert nanojoule back to picojoule?
Use the reverse factor: 1 nanojoule equals 1,000 picojoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a picojoule?
Picojoule (pJ) is a unit of engineering.
What is a nanojoule?
Nanojoule (nJ) is a unit of engineering.
Is the picojoule to nanojoule conversion exact?
Yes. Both picojoule and nanojoule 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.