Quectojoule is 1e-30 joule units.
Quectojoules to Zeptojoules Converter — qJ to zJ
Convert Quectojoule (qJ) to Zeptojoule (zJ) using the exact conversion factor (1 quectojoule = 1e-9 zeptojoule). See the formula, worked examples, and conversion table.
Quectojoules to Zeptojoules 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.
Zeptojoule is 1e-21 joule units.
Result = input x 1e-30 / 1e-21.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Quectojoules to Zeptojoules
Quectojoule and Zeptojoule both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Quectojoule is 1e-30 joule units, and zeptojoule is 1e-21 joule units.
Formula
zeptojoules = quectojoules × 1e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 quectojoule equals 1e-30 base units, and 1 zeptojoule equals 1e-21 base units, so dividing one by the other gives the direct quectojoule-to-zeptojoule factor of 1e-9.
Simple example
1 qJ × 1e-9 = 1e-9 zJ
1 quectojoule = 1e-9 zeptojoules.
Real-world example
100 qJ × 1e-9 = 1e-7 zJ
100 quectojoules = 1e-7 zeptojoules.
Conversion table
| Quectojoule (qJ) | Zeptojoule (zJ) |
|---|---|
| 1 qJ | 1e-9 zJ |
| 10 qJ | 1e-8 zJ |
| 100 qJ | 1e-7 zJ |
| 500 qJ | 5e-7 zJ |
| 1,000 qJ | 0.000001 zJ |
| 2,000 qJ | 0.000002 zJ |
Reverse conversion: Zeptojoule to Quectojoule
1e-9 zJ × 1000000000 = 1 qJ
1e-9 zeptojoules = 1 quectojoules.
quectojoules = zeptojoules × 1000000000
For a page dedicated to this direction, see Zeptojoule to Quectojoule.
Understanding the Quectojoule (qJ)
Quectojoule is 1e-30 joule units.
Understanding the Zeptojoule (zJ)
Zeptojoule is 1e-21 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many zeptojoules are in 1 quectojoule?
1 quectojoule equals 1e-9 zeptojoules, using the exact defined conversion factor rather than an estimate.
How do I convert quectojoule to zeptojoule?
Multiply the quectojoule value by 1e-9. The converter above does this instantly to whatever precision you set.
How do I convert zeptojoule back to quectojoule?
Use the reverse factor: 1 zeptojoule equals 1,000,000,000 quectojoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a quectojoule?
Quectojoule (qJ) is a unit of energy.
What is a zeptojoule?
Zeptojoule (zJ) is a unit of energy.
Is the quectojoule to zeptojoule conversion exact?
Yes. Both quectojoule and zeptojoule are defined by fixed standards rather than physical artifacts, so the factor of 1e-9 used above is exact to as many digits as you choose to display.