Zeptojoule is 1e-21 joule units.
Zeptojoules to Quectojoules Converter — zJ to qJ
Convert Zeptojoule (zJ) to Quectojoule (qJ) using the exact conversion factor (1 zeptojoule = 1,000,000,000 quectojoule). See the formula, worked examples, and conversion table.
Zeptojoules to Quectojoules 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.
Quectojoule is 1e-30 joule units.
Result = input x 1e-21 / 1e-30.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Zeptojoules to Quectojoules
Zeptojoule and Quectojoule both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Zeptojoule is 1e-21 joule units, and quectojoule is 1e-30 joule units.
Formula
quectojoules = zeptojoules × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 zeptojoule equals 1e-21 base units, and 1 quectojoule equals 1e-30 base units, so dividing one by the other gives the direct zeptojoule-to-quectojoule factor of 1000000000.
Simple example
1 zJ × 1000000000 = 1,000,000,000 qJ
1 zeptojoule = 1,000,000,000 quectojoules.
Real-world example
100 zJ × 1000000000 = 100,000,000,000 qJ
100 zeptojoules = 100,000,000,000 quectojoules.
Conversion table
| Zeptojoule (zJ) | Quectojoule (qJ) |
|---|---|
| 1 zJ | 1,000,000,000 qJ |
| 10 zJ | 10,000,000,000 qJ |
| 100 zJ | 100,000,000,000 qJ |
| 500 zJ | 500,000,000,000 qJ |
| 1,000 zJ | 1,000,000,000,000 qJ |
| 2,000 zJ | 2e+12 qJ |
Reverse conversion: Quectojoule to Zeptojoule
1 qJ × 1e-9 = 1e-9 zJ
1 quectojoule = 1e-9 zeptojoules.
zeptojoules = quectojoules × 1e-9
For a page dedicated to this direction, see Quectojoule to Zeptojoule.
Understanding the Zeptojoule (zJ)
Zeptojoule is 1e-21 joule units.
Understanding the Quectojoule (qJ)
Quectojoule is 1e-30 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many quectojoules are in 1 zeptojoule?
1 zeptojoule equals 1,000,000,000 quectojoules, using the exact defined conversion factor rather than an estimate.
How do I convert zeptojoule to quectojoule?
Multiply the zeptojoule value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert quectojoule back to zeptojoule?
Use the reverse factor: 1 quectojoule equals 1e-9 zeptojoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a zeptojoule?
Zeptojoule (zJ) is a unit of energy.
What is a quectojoule?
Quectojoule (qJ) is a unit of energy.
Is the zeptojoule to quectojoule conversion exact?
Yes. Both zeptojoule and quectojoule 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.