A yoctojoule (yJ) is a metric-prefixed unit of energy equal to 10-24 joules, a fraction of a single joule, using the SI yocto prefix.
Yoctojoules to Joules
Convert Yoctojoule (yJ) to Joule (J) instantly with an exact formula, conversion table, and FAQ.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
Energy calculator
Energy Converter
Convert yoctojoules (yJ) to joules (J) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
J = yJ × 1.000000000e-24
Results update instantly for Yoctojoules to Joules conversions.
Reserved above the conversion cards and below the converter.
Formula
J = yJ × 1.000000000e-24
yJ = J × 1.000000000e+24
Conversion table
| 1 yJ | 1.000000e-24 J |
| 5 yJ | 5.000000e-24 J |
| 10 yJ | 1.000000e-23 J |
| 20 yJ | 2.000000e-23 J |
| 50 yJ | 5.000000e-23 J |
| 100 yJ | 1.000000e-22 J |
| 500 yJ | 5.000000e-22 J |
| 1000 yJ | 1.000000e-21 J |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both yoctojoule and joule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in yoctojoules by 1.000000000e-24 to get joules. To reverse the conversion, multiply a joule value by 1.000000000e+24 to get back to yoctojoules.
Frequently asked questions
What is Yoctojoule (yJ)?
A yoctojoule (yJ) is a metric-prefixed unit of energy equal to 10-24 joules, a fraction of a single joule, using the SI yocto prefix.
What is Joule (J)?
The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
How do I convert yoctojoules to joules?
Multiply the yoctojoule value by 1.000000000e-24 to get the equivalent in joules. For example, 5 yJ × 1.000000000e-24 = 5.000000e-24 J.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-24 is an exact, non-rounded value.
Can I convert joules back to yoctojoules?
Yes. Divide the joule value by 1.000000000e-24, or multiply it by 1.000000000e+24, to get yoctojoules.
Reserved between the FAQ and the article so the page stays balanced.
About converting yoctojoules to joules
A yoctojoule (yJ) is a metric-prefixed unit of energy equal to 10-24 joules, a fraction of a single joule, using the SI yocto prefix. The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
Use this calculator to move between yoctojoules and joules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.