A US liquid quart is one quarter of a US gallon.
Quarts to Milliliters Converter — qt to mL
Convert Quart (qt) to Milliliter (mL) using the exact conversion factor (1 quart = 946.352946 milliliter). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Quarts to Milliliters 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.
Milliliter is 0.001 liter units.
Result = input x 0.000946352946 / 1e-6.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Quarts to Milliliters
Quart and Milliliter 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 typically associated with united States (cooking, dairy, motor oil packaging), while Milliliter is typically associated with standard small-volume unit worldwide.
Formula
milliliters = quarts × 946.352946
This factor comes from each unit's defined relationship to the category's base unit: 1 quart equals 0.000946352946 base units, and 1 milliliter equals 0.000001 base units, so dividing one by the other gives the direct quart-to-milliliter factor of 946.352946.
Simple example
1 qt × 946.352946 = 946.352946 mL
1 quart = 946.352946 milliliters.
Real-world example
10 qt × 946.352946 = 9,463.52946 mL
10 quarts = 9,463.52946 milliliters.
Conversion table
| Quart (qt) | Milliliter (mL) |
|---|---|
| 1 qt | 946.352946 mL |
| 5 qt | 4,731.76473 mL |
| 10 qt | 9,463.52946 mL |
| 25 qt | 23,658.82365 mL |
| 50 qt | 47,317.6473 mL |
| 100 qt | 94,635.2946 mL |
Reverse conversion: Milliliter to Quart
946.352946 mL × 0.001056688209 = 1 qt
946.352946 milliliters = 1 quarts.
quarts = milliliters × 0.00105668820943
For a page dedicated to this direction, see Milliliter to Quart.
Quart vs. Milliliter
| Aspect | Quart | Milliliter |
|---|---|---|
| Family | US customary unit | SI derived (metric prefix) unit |
| Typical use | US recipe measurement (larger liquid volumes) | Medicine dosing (worldwide, including in the US) |
| Where it's used | United States (cooking, dairy, motor oil packaging) | Standard small-volume unit worldwide |
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 Milliliter
Milliliter (mL) measures volume. A milliliter is one-thousandth of a liter, equal to one cubic centimeter. It is classified as a SI derived (metric prefix) unit.
Where it's used: Standard small-volume unit worldwide
Uses of the Milliliter today
- Medicine dosing (worldwide, including in the US)
- Cooking and recipe measurement outside the US
- Beverage and small-container labeling
History of the Milliliter
The milliliter follows directly from the liter via the 'milli-' SI prefix. It is notable as one of the few metric units in routine US use, since medicine dosing (syringes, liquid medication) is specified in milliliters even in the US.
Historical origin. Milliliter 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.
Milliliter — sources
- BIPM SI Brochure — SI prefixes — Defines 'milli-' as the prefix for 10⁻³.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many milliliters are in 1 quart?
1 quart equals 946.352946 milliliters, using the exact defined conversion factor rather than an estimate.
How do I convert quart to milliliter?
Multiply the quart value by 946.352946. The converter above does this instantly to whatever precision you set.
How do I convert milliliter back to quart?
Use the reverse factor: 1 milliliter equals 0.0010566882 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 milliliter?
Milliliter (mL) measures volume. A milliliter is one-thousandth of a liter, equal to one cubic centimeter. It is classified as a SI derived (metric prefix) unit.
Is the quart to milliliter 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)