Nanojoule is 1e-9 joule units.
Nanojoules to Microjoules Converter — nJ to uJ
Convert Nanojoule (nJ) to Microjoule (uJ) using the exact conversion factor (1 nanojoule = 0.001 microjoule). See the formula, worked examples, and conversion table.
Nanojoules to Microjoules 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.
Microjoule is 0.000001 joule units.
Result = input x 1e-9 / 1e-6.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Nanojoules to Microjoules
Nanojoule and Microjoule 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: Nanojoule is 1e-9 joule units, and microjoule is 0.000001 joule units.
Formula
microjoules = nanojoules × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 nanojoule equals 1e-9 base units, and 1 microjoule equals 0.000001 base units, so dividing one by the other gives the direct nanojoule-to-microjoule factor of 0.001.
Simple example
1 nJ × 0.001 = 0.001 uJ
1 nanojoule = 0.001 microjoules.
Real-world example
100 nJ × 0.001 = 0.1 uJ
100 nanojoules = 0.1 microjoules.
Conversion table
| Nanojoule (nJ) | Microjoule (uJ) |
|---|---|
| 1 nJ | 0.001 uJ |
| 10 nJ | 0.01 uJ |
| 50 nJ | 0.05 uJ |
| 100 nJ | 0.1 uJ |
| 500 nJ | 0.5 uJ |
| 1,000 nJ | 1 uJ |
Reverse conversion: Microjoule to Nanojoule
0.001 uJ × 1000 = 1 nJ
0.001 microjoules = 1 nanojoule.
nanojoules = microjoules × 1000
For a page dedicated to this direction, see Microjoule to Nanojoule.
Understanding the Nanojoule (nJ)
Nanojoule is 1e-9 joule units.
Understanding the Microjoule (uJ)
Microjoule is 0.000001 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many microjoules are in 1 nanojoule?
1 nanojoule equals 0.001 microjoules, using the exact defined conversion factor rather than an estimate.
How do I convert nanojoule to microjoule?
Multiply the nanojoule value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert microjoule back to nanojoule?
Use the reverse factor: 1 microjoule equals 1,000 nanojoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a nanojoule?
Nanojoule (nJ) is a unit of engineering.
What is a microjoule?
Microjoule (uJ) is a unit of engineering.
Is the nanojoule to microjoule conversion exact?
Yes. Both nanojoule and microjoule 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.