What is a quart? What is a liter?
A quart is a unit of volume used almost entirely in the United States, and it's a quarter of a gallon — that's where the name comes from. A liter is the metric unit the rest of the world measures liquid in. The two are close enough to be confusing and far enough apart to ruin a big batch of soup. This page explains the conversion, shows the numbers people actually search for, and the Quarts to Liters Converter at the top of the page does the arithmetic as you type.
The quart
There are two quarts in circulation, and that's the first thing worth knowing. The US liquid quart is 57.75 cubic inches, which works out to exactly 0.946352946 liters — a hair under a liter. It's what an American recipe means, what's printed on a carton of stock, and what an owner's manual means when it says your engine takes five quarts of oil. The UK imperial quart is a quarter of the 4.54609-liter imperial gallon, so it lands at exactly 1.1365225 liters — a hair over. That makes an imperial quart about 20% bigger than a US one. Britain retired it for most trade decades ago, but it still turns up in older cookbooks and in Commonwealth recipes written before the metric switch.
The liter
A liter is one cubic decimeter — a cube 10 cm on every side, 1,000 cm³. That definition is the reason metric cooking feels tidy: one liter of water weighs almost exactly one kilogram, and one milliliter weighs one gram. Every measuring jug, beaker, and bottle outside the US is graduated in liters and milliliters, which is why the converter gives you the milliliter figure alongside the liter one. Most quart-sized amounts land somewhere between 200 mL and 8 L, and milliliters are what your jug actually has lines for.
How quarts to liters conversion works
It's one multiplication. Pick the constant that matches the quart you have.
US: liters = quarts × 0.946352946
UK imperial: liters = quarts × 1.1365225
Both constants are exact legal definitions, not measurements — there's no rounding hiding inside them.
Worked example. Your recipe calls for 2 quarts of chicken stock and your jug is metric. Multiply: 2 × 0.946352946 = 1.892705892, which the converter shows as 1.8927 L, with 1,892.7059 mL underneath it. Pour 1.9 liters and you're off by seven milliliters — about a teaspoon and a half. Nobody has ever tasted that difference in a pot of stock.
If that recipe turned out to be British and pre-metric, the same 2 quarts means 2 × 1.1365225 = 2.273 L. That's the reading the converter puts on the second line, and it's 380 mL more than the US answer — most of a mug. This is why the Quarts to Liters Converter shows both at once instead of making you pick from a dropdown first. When you're converting into liters, the ambiguous unit is the one you typed, and guessing on your behalf would be wrong roughly half the time.
The constants are exact because the units are defined, not measured. The US quart got its value the moment the inch was pinned to exactly 25.4 mm; the imperial quart inherits its value from the 4.54609-liter gallon. So the only rounding anywhere in the chain is on screen.
Common quarts-to-liters conversions
These are the sizes that come up. The third column is what that volume usually is in real life, because "3 quarts" means more when you know it's a saucepan.
| Quarts | US quarts → liters | UK quarts → liters | What it usually is |
|---|---|---|---|
| 0.25 qt | 0.236588 L | 0.284131 L | 1 US cup |
| 0.5 qt | 0.473176 L | 0.568261 L | 1 US pint |
| 1 qt | 0.946353 L | 1.1365 L | A carton of stock or buttermilk |
| 1.5 qt | 1.4195 L | 1.7048 L | Small casserole dish |
| 2 qt | 1.8927 L | 2.273 L | Standard 8×8 baking dish |
| 3 qt | 2.8391 L | 3.4096 L | Everyday saucepan |
| 4 qt | 3.7854 L | 4.5461 L | 1 US gallon |
| 5 qt | 4.7318 L | 5.6826 L | A typical oil change |
| 6 qt | 5.6781 L | 6.8191 L | Slow cooker |
| 8 qt | 7.5708 L | 9.0922 L | Stockpot |
Two patterns are worth memorizing. First, the US column is always about 5% smaller than the number of quarts — 4 quarts is 3.79 L, 10 quarts is 9.46 L. Subtract a twentieth and you're close enough to decide whether something fits in a pot. Second, the 4-quart row is exactly 3.785411784 L because four US quarts is the US gallon, by definition. If you're working in gallons, the gallons to liters converter skips the intermediate step.
Notice the imperial column crosses 1 liter one row earlier than the US column. One imperial quart is already 1.1365 L, while one US quart is still 0.946353 L. That single-row offset is the whole reason a recipe converted with the wrong quart comes out visibly wrong rather than subtly wrong.
When you'll need to convert quarts to liters
Cooking from an American recipe with metric equipment. This is the common one. US recipes hand you quarts of stock, brine, or milk; your jug is marked in milliliters. Two quarts of brine is 1.8927 L. If the recipe also throws cups at you, the quarts to cups converter handles that side, and the cooking measurement converter covers spoons, ounces, and pints in one place.
Oil changes and car fluids. American owner's manuals list capacity in quarts while oil is sold in 1 L, 4 L, and 5 L containers nearly everywhere else. A 5-quart change is 4.7318 L, so a 5-liter jug covers it with about 270 mL left in the bottle. Check whether your manual's figure includes the filter — the with-filter number is usually a few tenths of a quart higher, which is the difference between one jug and two.
Buying equipment across markets. Slow cookers, stockpots, and food containers are sold in quarts in the US and liters elsewhere. A 6-quart cooker is 5.68 L, so a 6-liter model is slightly roomier, not smaller.
Scaling a batch. Rounding a quart to "about a liter" is harmless once. Do it across a 12-quart batch and you've added more than half a liter of liquid. If you're multiplying a recipe up or down first, the recipe scaler does that part, then convert the result.
Edge cases and gotchas
The dry quart is a different unit. A US dry quart is 1.101220942715 L — about 16% bigger than the liquid quart — and it measures produce sold by volume, like a quart of berries at a farm stand. If you're converting something pourable, you want the liquid quart this page uses. Converting a box of blueberries with the liquid constant undersells it by about 155 mL.
Don't round the constant to 0.95. It costs you nothing at 1 quart and nearly 15 mL at 4 quarts, but at 20 quarts the error is 73 mL — and the whole point of converting is to not be off by a measurable amount.
Commas mean different things in different countries. Typing 1,250 reads as one thousand two hundred fifty here, the US way. In much of Europe that same string means 1.25. The Quarts to Liters Converter accepts grouped thousands and flags the reading it used, so if you meant one and a quarter quarts, type 1.25 with a dot.
Negative volumes and other units get refused, not guessed. Type a negative number and the converter says so rather than returning a negative liter figure. Type 2 liters into a quarts field and it tells you which unit it's expecting instead of silently treating 2 liters as 2 quarts — a quiet 5% error is worse than a visible complaint. A trailing qt or quarts is fine; it gets stripped.
The decimals change at 1 liter. Results of 1 L and above show four decimal places; below that you get six, so 0.5 qt reads as 0.473176 L rather than a blunt 0.4732. Small amounts are where the extra digits matter, and very large volumes print as whole liters with commas instead of flipping into scientific notation.
Related converters
Going the other way is the liters to quarts converter — useful when a metric recipe meets American cookware. For the units a quart sits between, there's the quarts to cups converter and the mL to cups converter. Working in bigger volumes, use gallons to liters. Baking by weight instead of volume, the cups to grams converter handles flour, sugar, and butter, which don't share water's neat 1 mL = 1 g relationship.
A quart-to-liter answer takes a second to produce, and plenty of pages treat that second as a lead magnet — the number sits behind an email field, a 14-day trial for a "conversion suite" you'd open twice a year, or a subscription that recently grew an AI badge and a higher price. That's the pattern this page is built against: no account, no trial, no upsell, nothing stored, and the math runs in your browser. Microapp gives 10% of every dollar it earns to charity, off the top, audited quarterly. The Quarts to Liters Converter is the whole product.
Frequently asked questions
How many liters are in a quart?
Exactly 0.946352946 L in a US liquid quart — round it to 0.946 L or 946 mL. A UK imperial quart is exactly 1.1365225 L, or about 1,137 mL. So a US quart is just under a liter and an imperial quart is just over one.
Is 1 quart the same as 1 liter?
No, but they're close. A US quart is about 5.4% short of a liter. Swapping them in a single-batch recipe is invisible; swapping them across ten quarts leaves you more than half a liter off, which is enough to thin a sauce or overflow a pan.
How many liters is 2 quarts?
1.8927 liters, or 1,892.7 mL, reading them as US liquid quarts. Pouring 1.9 L gets you there within a teaspoon and a half. If the recipe is old and British, 2 imperial quarts is 2.273 L instead.
How many liters is 5 quarts?
4.7318 liters. This is the oil-change number: a 5-liter jug covers a 5-quart capacity with roughly 270 mL to spare. Ten quarts is 9.4635 L, and 6 quarts is 5.6781 L.
Should I use the US or the imperial quart?
Use the US liquid quart unless you have a specific reason not to. American recipes, US product labels, and US owner's manuals all mean it, and that covers nearly every quart figure you'll meet today. Reach for the imperial reading when your source is a British or Commonwealth cookbook printed before metrication — the Quarts to Liters Converter shows that figure on the line under the main result, so you don't have to choose up front.
Can I convert liters back to quarts here?
This page runs one direction. For the reverse, the liters to quarts converter divides by the same constants and shows the US and imperial readings side by side. As a sanity check, 1 liter is about 1.057 US quarts.
Why does my answer show six decimal places?
Because the result is under a liter, and small amounts are where precision earns its keep. Half a quart is 0.473176 L, and cutting that to 0.47 loses 3 mL — noticeable in a vinaigrette or a cocktail. Anything from 1 L up shows four decimals instead. Nothing is rounded before the display: the multiplication uses the exact defined constants, and the Copy formula button gives you the full calculation with your number in it.