Decajoule is 10 joule units.
Decajoules to Femtojoules Converter — daJ to fJ
Convert Decajoule (daJ) to Femtojoule (fJ) using the exact conversion factor (1 decajoule = 1e+16 femtojoule). See the formula, worked examples, and conversion table.
Decajoules to Femtojoules 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.
Femtojoule is 1e-15 joule units.
Result = input x 10 / 1e-15.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Decajoules to Femtojoules
Decajoule and Femtojoule 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: Decajoule is 10 joule units, and femtojoule is 1e-15 joule units.
Formula
femtojoules = decajoules × 1e+16
This factor comes from each unit's defined relationship to the category's base unit: 1 decajoule equals 10 base units, and 1 femtojoule equals 1e-15 base units, so dividing one by the other gives the direct decajoule-to-femtojoule factor of 1e+16.
Simple example
1 daJ × 1e+16 = 1e+16 fJ
1 decajoule = 1e+16 femtojoules.
Real-world example
100 daJ × 1e+16 = 1e+18 fJ
100 decajoules = 1e+18 femtojoules.
Conversion table
| Decajoule (daJ) | Femtojoule (fJ) |
|---|---|
| 1 daJ | 1e+16 fJ |
| 10 daJ | 1e+17 fJ |
| 50 daJ | 5e+17 fJ |
| 100 daJ | 1e+18 fJ |
| 500 daJ | 5e+18 fJ |
| 1,000 daJ | 1e+19 fJ |
Reverse conversion: Femtojoule to Decajoule
1e+16 fJ × 1e-16 = 1 daJ
1e+16 femtojoules = 1 decajoule.
decajoules = femtojoules × 1e-16
For a page dedicated to this direction, see Femtojoule to Decajoule.
Understanding the Decajoule (daJ)
Decajoule is 10 joule units.
Understanding the Femtojoule (fJ)
Femtojoule is 1e-15 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many femtojoules are in 1 decajoule?
1 decajoule equals 1e+16 femtojoules, using the exact defined conversion factor rather than an estimate.
How do I convert decajoule to femtojoule?
Multiply the decajoule value by 1e+16. The converter above does this instantly to whatever precision you set.
How do I convert femtojoule back to decajoule?
Use the reverse factor: 1 femtojoule equals 1e-16 decajoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a decajoule?
Decajoule (daJ) is a unit of engineering.
What is a femtojoule?
Femtojoule (fJ) is a unit of engineering.
Is the decajoule to femtojoule conversion exact?
Yes. Both decajoule and femtojoule are defined by fixed standards rather than physical artifacts, so the factor of 1e+16 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.