Femtojoule is 1e-15 joule units.
Femtojoules to Yoctojoules Converter — fJ to yJ
Convert Femtojoule (fJ) to Yoctojoule (yJ) using the exact conversion factor (1 femtojoule = 1,000,000,000 yoctojoule). See the formula, worked examples, and conversion table.
Femtojoules to Yoctojoules converter
Converter
Energy Converter
Convert joules, calories, kilowatt-hours, BTU, electronvolts, therms, and mechanical work units.
Context values
Some unit families need one extra value for a physically accurate result.
Yoctojoule is 1e-24 joule units.
Result = input x 1e-15 / 1e-24.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Femtojoules to Yoctojoules
Femtojoule and Yoctojoule both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Femtojoule is 1e-15 joule units, and yoctojoule is 1e-24 joule units.
Formula
yoctojoules = femtojoules × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 femtojoule equals 1e-15 base units, and 1 yoctojoule equals 1e-24 base units, so dividing one by the other gives the direct femtojoule-to-yoctojoule factor of 1000000000.
Simple example
1 fJ × 1000000000 = 1,000,000,000 yJ
1 femtojoule = 1,000,000,000 yoctojoules.
Real-world example
100 fJ × 1000000000 = 100,000,000,000 yJ
100 femtojoules = 100,000,000,000 yoctojoules.
Conversion table
| Femtojoule (fJ) | Yoctojoule (yJ) |
|---|---|
| 1 fJ | 1,000,000,000 yJ |
| 10 fJ | 10,000,000,000 yJ |
| 100 fJ | 100,000,000,000 yJ |
| 500 fJ | 500,000,000,000 yJ |
| 1,000 fJ | 1e+12 yJ |
| 2,000 fJ | 2e+12 yJ |
Reverse conversion: Yoctojoule to Femtojoule
1 yJ × 1e-9 = 1e-9 fJ
1 yoctojoule = 1e-9 femtojoules.
femtojoules = yoctojoules × 1e-9
For a page dedicated to this direction, see Yoctojoule to Femtojoule.
Understanding the Femtojoule (fJ)
Femtojoule is 1e-15 joule units.
Understanding the Yoctojoule (yJ)
Yoctojoule is 1e-24 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many yoctojoules are in 1 femtojoule?
1 femtojoule equals 1,000,000,000 yoctojoules, using the exact defined conversion factor rather than an estimate.
How do I convert femtojoule to yoctojoule?
Multiply the femtojoule value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert yoctojoule back to femtojoule?
Use the reverse factor: 1 yoctojoule equals 1e-9 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 energy.
What is a yoctojoule?
Yoctojoule (yJ) is a unit of energy.
Is the femtojoule to yoctojoule conversion exact?
Yes. Both femtojoule and yoctojoule are defined by fixed standards rather than physical artifacts, so the factor of 1000000000 used above is exact to as many digits as you choose to display.