A femtojoule (fJ) is a metric-prefixed unit of energy equal to 10-15 joules, a fraction of a single joule, using the SI femto prefix.
Femtojoules to Nanojoules
Convert Femtojoule (fJ) to Nanojoule (nJ) 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 femtojoules (fJ) to nanojoules (nJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A nanojoule (nJ) is a metric-prefixed unit of energy equal to 10-9 joules, a fraction of a single joule, using the SI nano prefix.
nJ = fJ × 0.000001
Results update instantly for Femtojoules to Nanojoules conversions.
Reserved above the conversion cards and below the converter.
Formula
nJ = fJ × 0.000001
fJ = nJ × 1000000
Conversion table
| 1 fJ | 0.000001 nJ |
| 5 fJ | 0.000005 nJ |
| 10 fJ | 0.000010 nJ |
| 20 fJ | 0.000020 nJ |
| 50 fJ | 0.000050 nJ |
| 100 fJ | 0.000100 nJ |
| 500 fJ | 0.000500 nJ |
| 1000 fJ | 0.001000 nJ |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both femtojoule and nanojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in femtojoules by 0.000001 to get nanojoules. To reverse the conversion, multiply a nanojoule value by 1000000 to get back to femtojoules.
Frequently asked questions
What is Femtojoule (fJ)?
A femtojoule (fJ) is a metric-prefixed unit of energy equal to 10-15 joules, a fraction of a single joule, using the SI femto prefix.
What is Nanojoule (nJ)?
A nanojoule (nJ) is a metric-prefixed unit of energy equal to 10-9 joules, a fraction of a single joule, using the SI nano prefix.
How do I convert femtojoules to nanojoules?
Multiply the femtojoule value by 0.000001 to get the equivalent in nanojoules. For example, 5 fJ × 0.000001 = 0.000005 nJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.000001 is an exact, non-rounded value.
Can I convert nanojoules back to femtojoules?
Yes. Divide the nanojoule value by 0.000001, or multiply it by 1000000, to get femtojoules.
Reserved between the FAQ and the article so the page stays balanced.
About converting femtojoules to nanojoules
A femtojoule (fJ) is a metric-prefixed unit of energy equal to 10-15 joules, a fraction of a single joule, using the SI femto prefix. A nanojoule (nJ) is a metric-prefixed unit of energy equal to 10-9 joules, a fraction of a single joule, using the SI nano prefix.
Use this calculator to move between femtojoules and nanojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.