A US liquid quart is one quarter of a US gallon.
Quarts to Femtoliters Converter — qt to fL
Convert Quart (qt) to Femtoliter (fL) using the exact conversion factor (1 quart = 9.463529e+14 femtoliter). See the formula, worked examples, conversion table, history, and common uses.
Quarts to Femtoliters 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.
Femtoliter is 1e-15 liter units.
Result = input x 0.000946352946 / 1e-18.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Quarts to Femtoliters
Quart and Femtoliter 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. Quart is most often used for us recipe measurement (larger liquid volumes).
Formula
femtoliters = quarts × 9.463529e+14
This factor comes from each unit's defined relationship to the category's base unit: 1 quart equals 0.000946352946 base units, and 1 femtoliter equals 1e-18 base units, so dividing one by the other gives the direct quart-to-femtoliter factor of 9.463529e+14.
Simple example
1 qt × 9.463529e+14 = 9.463529e+14 fL
1 quart = 9.463529e+14 femtoliters.
Real-world example
10 qt × 9.463529e+14 = 9.463529e+15 fL
10 quarts = 9.463529e+15 femtoliters.
Conversion table
| Quart (qt) | Femtoliter (fL) |
|---|---|
| 1 qt | 9.463529e+14 fL |
| 5 qt | 4.731765e+15 fL |
| 10 qt | 9.463529e+15 fL |
| 25 qt | 2.365882e+16 fL |
| 50 qt | 4.731765e+16 fL |
| 100 qt | 9.463529e+16 fL |
Reverse conversion: Femtoliter to Quart
9.463529e+14 fL × 1.056688e-15 = 0.9999999514 qt
9.463529e+14 femtoliters = 0.9999999514 quarts.
quarts = femtoliters × 1.056688e-15
For a page dedicated to this direction, see Femtoliter to Quart.
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.
Understanding the Femtoliter (fL)
Femtoliter is 1e-15 liter units.
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 femtoliters are in 1 quart?
1 quart equals 9.463529e+14 femtoliters, using the exact defined conversion factor rather than an estimate.
How do I convert quart to femtoliter?
Multiply the quart value by 9.463529e+14. The converter above does this instantly to whatever precision you set.
How do I convert femtoliter back to quart?
Use the reverse factor: 1 femtoliter equals 1.056688e-15 quarts. You can also use the swap control in the converter above to flip the direction instantly.
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.
What is a femtoliter?
Femtoliter (fL) is a unit of volume.
Is the quart to femtoliter 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.
Where is the quart still used today?
United States (cooking, dairy, motor oil packaging)