Quarts to Liters

How Many Liters in a Quart?

One US quart equals 0.946353 liters, or approximately 946 milliliters. To convert quarts to liters, multiply the number of quarts by 0.946353. The quart and the liter are remarkably close in size, and a US quart is only about 5.4% smaller than a liter, which makes mental conversion straightforward: 1 quart is approximately 1 liter. This conversion is commonly needed when following American recipes that call for quarts of broth, water, or milk, when buying motor oil sold in quarts in the US but liters elsewhere, when understanding US engine displacement, and when converting between American and international cooking measurements. The term "quart" literally means "quarter" because it is one-quarter of a US gallon. Because a quart is so close to a liter, this is one of the easiest large-volume conversions to estimate in your head. That near-equivalence is useful, but it can also create lazy errors: 1 quart is not exactly 1 liter, and the 54 mL gap grows when you scale to several quarts. For casual cooking you can round aggressively; for automotive fluids, chemical mixing, or batch production, use the exact factor.

How to Convert US Quart to Liter

1. Start with the volume in US quarts.
2. Multiply by 0.946353 to get the exact liter equivalent.
3. For a quick estimate, treat 1 quart as 1 liter — the error is only about 5.4%, which is acceptable for most cooking and casual use.
4. For Imperial quarts (used in the UK historically), multiply by 1.13652 instead — the Imperial quart is larger than both the US quart and the liter.
5. Verify: 4 quarts should give approximately 3.785 liters (1 US gallon).

Real-World Examples

Related Converters

History of US Quart and Liter

The quart's name comes directly from the Latin "quartus" (fourth), because it is one-quarter of a gallon. The unit has been used in English commerce since at least the 13th century, though its exact volume varied by region and commodity until standardization efforts in the 18th and 19th centuries. The US quart is defined as exactly 1/4 of a US gallon, or 32 US fluid ounces, equaling 946.353 ml. Like other US volume measures, it derives from the English wine gallon of 231 cubic inches. The Imperial quart, based on the larger Imperial gallon, equals 1,136.52 ml — about 20% larger than the US quart. The near-equivalence of the US quart and the liter is a happy coincidence. The liter was defined in 1795 as one cubic decimeter (1,000 ml), while the US quart was inherited from pre-metric English measurement. The fact that they differ by only about 54 ml makes them almost interchangeable for casual use, and this proximity has helped ease the transition for Americans encountering metric measurements. The quart remains one of the most commonly used US volume measures. Motor oil, cooking liquids, ice cream (in half-gallon/2-quart containers), paint, and many other products are sold by the quart in the United States.

Common Mistakes to Avoid

• Treating quarts and liters as exactly equal. A US quart is 946 ml — about 5.4% less than a liter. For precise applications (motor oil capacities, chemical mixing), this difference matters.
• Confusing US quarts with Imperial quarts. An Imperial quart is 1,137 ml — 20% larger than a US quart (946 ml) and slightly larger than a liter (1,000 ml). Old British recipes and some Canadian references may use Imperial quarts.
• Forgetting the US dry quart exists. A US dry quart equals 1,101 ml — about 16.4% larger than a US liquid quart. Dry quarts are occasionally used for measuring grain and produce.
• Dividing gallons by 2 instead of 4 to get quarts. There are 4 quarts in a gallon, not 2. Dividing by 2 gives half-gallons (about 1.89 liters each).
• Rounding a quart to 1 liter when scaling large recipes. For a recipe calling for 8 quarts, using 8 liters instead of the correct 7.57 liters adds nearly half a liter of extra liquid.

Frequently Asked Questions

Further Reading