Zeptoliter is 1e-21 liter units.
Zeptoliters to Quarts Converter — zL to qt
Convert Zeptoliter (zL) to Quart (qt) using the exact conversion factor (1 zeptoliter = 1.056688e-21 quart). See the formula, worked examples, conversion table, history, and common uses.
Zeptoliters to Quarts converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
A US liquid quart is one quarter of a US gallon.
Result = input x 1e-24 / 0.000946352946.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Zeptoliters to Quarts
Zeptoliter and Quart appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Specifically: Zeptoliter is 1e-21 liter units, and a US liquid quart is one quarter of a US gallon.
Formula
quarts = zeptoliters × 1.056688e-21
This factor comes from each unit's defined relationship to the category's base unit: 1 zeptoliter equals 1e-24 base units, and 1 quart equals 0.000946352946 base units, so dividing one by the other gives the direct zeptoliter-to-quart factor of 1.056688e-21.
Simple example
1 zL × 1.056688e-21 = 1.056688e-21 qt
1 zeptoliter = 1.056688e-21 quarts.
Real-world example
10 zL × 1.056688e-21 = 1.056688e-20 qt
10 zeptoliters = 1.056688e-20 quarts.
Conversion table
| Zeptoliter (zL) | Quart (qt) |
|---|---|
| 1 zL | 1.056688e-21 qt |
| 5 zL | 5.283441e-21 qt |
| 10 zL | 1.056688e-20 qt |
| 25 zL | 2.641721e-20 qt |
| 50 zL | 5.283441e-20 qt |
| 100 zL | 1.056688e-19 qt |
Reverse conversion: Quart to Zeptoliter
1.056688e-21 qt × 9.463529e+20 = 0.9999998018 zL
1.056688e-21 quarts = 0.9999998018 zeptoliters.
zeptoliters = quarts × 9.463529e+20
For a page dedicated to this direction, see Quart to Zeptoliter.
Understanding the Zeptoliter (zL)
Zeptoliter is 1e-21 liter units.
Understanding the Quart
Quart (qt) measures volume. The US liquid quart is exactly one-quarter of a US gallon: 0.946352946 liters. It is classified as a US customary unit.
Where it's used: United States (cooking, dairy, motor oil packaging)
Uses of the Quart today
- US recipe measurement (larger liquid volumes)
- US motor oil and automotive fluid packaging
- US dairy and beverage packaging (quart containers)
History of the Quart
The quart ('quarter' of a gallon) follows the same English wine-gallon lineage as the US gallon, retained by the US after England moved to a different imperial standard in 1824.
Historical origin. Quart was not the invention of a single named person; it developed through the process described above.
Quart — sources
- NIST Handbook 44, Appendix C — General tables of units including the US quart definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many quarts are in 1 zeptoliter?
1 zeptoliter equals 1.056688e-21 quarts, using the exact defined conversion factor rather than an estimate.
How do I convert zeptoliter to quart?
Multiply the zeptoliter value by 1.056688e-21. The converter above does this instantly to whatever precision you set.
How do I convert quart back to zeptoliter?
Use the reverse factor: 1 quart equals 9.463529e+20 zeptoliters. You can also use the swap control in the converter above to flip the direction instantly.
What is a zeptoliter?
Zeptoliter (zL) is a unit of volume.
What is a quart?
Quart (qt) measures volume. The US liquid quart is exactly one-quarter of a US gallon: 0.946352946 liters. It is classified as a US customary unit.
Is the zeptoliter to quart conversion exact?
Yes. The US liquid quart is exactly one-quarter of a US gallon: 0.946352946 liters. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.