A quettajoule (QJ) is a metric-prefixed unit of energy equal to 1030 joules, using the SI quetta prefix.
Quettajoules to Kilojoules
Convert Quettajoule (QJ) to Kilojoule (kJ) 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 quettajoules (QJ) to kilojoules (kJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
kJ = QJ × 1.000000000e+27
Results update instantly for Quettajoules to Kilojoules conversions.
Reserved above the conversion cards and below the converter.
Formula
kJ = QJ × 1.000000000e+27
QJ = kJ × 1.000000000e-27
Conversion table
| 1 QJ | 1.000000e+27 kJ |
| 5 QJ | 5.000000e+27 kJ |
| 10 QJ | 1.000000e+28 kJ |
| 20 QJ | 2.000000e+28 kJ |
| 50 QJ | 5.000000e+28 kJ |
| 100 QJ | 1.000000e+29 kJ |
| 500 QJ | 5.000000e+29 kJ |
| 1000 QJ | 1.000000e+30 kJ |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both quettajoule and kilojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in quettajoules by 1.000000000e+27 to get kilojoules. To reverse the conversion, multiply a kilojoule value by 1.000000000e-27 to get back to quettajoules.
Frequently asked questions
What is Quettajoule (QJ)?
A quettajoule (QJ) is a metric-prefixed unit of energy equal to 1030 joules, using the SI quetta prefix.
What is Kilojoule (kJ)?
A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
How do I convert quettajoules to kilojoules?
Multiply the quettajoule value by 1.000000000e+27 to get the equivalent in kilojoules. For example, 5 QJ × 1.000000000e+27 = 5.000000e+27 kJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e+27 is an exact, non-rounded value.
Can I convert kilojoules back to quettajoules?
Yes. Divide the kilojoule value by 1.000000000e+27, or multiply it by 1.000000000e-27, to get quettajoules.
Reserved between the FAQ and the article so the page stays balanced.
About converting quettajoules to kilojoules
A quettajoule (QJ) is a metric-prefixed unit of energy equal to 1030 joules, using the SI quetta prefix. A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
Use this calculator to move between quettajoules and kilojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.