Femtojoule is 1e-15 joule units.
Femtojoules to Decijoules Converter — fJ to dJ
Convert Femtojoule (fJ) to Decijoule (dJ) using the exact conversion factor (1 femtojoule = 1e-14 decijoule). See the formula, worked examples, and conversion table.
Femtojoules to Decijoules 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.
Decijoule is 0.1 joule units.
Result = input x 1e-15 / 0.1.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Femtojoules to Decijoules
Femtojoule and Decijoule 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: Femtojoule is 1e-15 joule units, and decijoule is 0.1 joule units.
Formula
decijoules = femtojoules × 1e-14
This factor comes from each unit's defined relationship to the category's base unit: 1 femtojoule equals 1e-15 base units, and 1 decijoule equals 0.1 base units, so dividing one by the other gives the direct femtojoule-to-decijoule factor of 1e-14.
Simple example
1 fJ × 1e-14 = 1e-14 dJ
1 femtojoule = 1e-14 decijoules.
Real-world example
100 fJ × 1e-14 = 1e-12 dJ
100 femtojoules = 1e-12 decijoules.
Conversion table
| Femtojoule (fJ) | Decijoule (dJ) |
|---|---|
| 1 fJ | 1e-14 dJ |
| 10 fJ | 1e-13 dJ |
| 50 fJ | 5e-13 dJ |
| 100 fJ | 1e-12 dJ |
| 500 fJ | 5e-12 dJ |
| 1,000 fJ | 1e-11 dJ |
Reverse conversion: Decijoule to Femtojoule
1e-14 dJ × 1e+14 = 1 fJ
1e-14 decijoules = 1 femtojoule.
femtojoules = decijoules × 1e+14
For a page dedicated to this direction, see Decijoule to Femtojoule.
Understanding the Femtojoule (fJ)
Femtojoule is 1e-15 joule units.
Understanding the Decijoule (dJ)
Decijoule is 0.1 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many decijoules are in 1 femtojoule?
1 femtojoule equals 1e-14 decijoules, using the exact defined conversion factor rather than an estimate.
How do I convert femtojoule to decijoule?
Multiply the femtojoule value by 1e-14. The converter above does this instantly to whatever precision you set.
How do I convert decijoule back to femtojoule?
Use the reverse factor: 1 decijoule equals 1e+14 femtojoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a femtojoule?
Femtojoule (fJ) is a unit of engineering.
What is a decijoule?
Decijoule (dJ) is a unit of engineering.
Is the femtojoule to decijoule conversion exact?
Yes. Both femtojoule and decijoule are defined by fixed standards rather than physical artifacts, so the factor of 1e-14 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.