Kitchen measures
How Many Ounces Are in a Quart?
32fluid ounces
US fluid ounces
40fluid ounces
UK / imperial
The US and imperial systems give different answers to this question. Go by where the recipe is from: American recipes mean 32, British and older Commonwealth recipes mean 40.
A US quart is 32 fluid ounces. An imperial quart is 40 — a 25% gap created by two separate differences stacking: the imperial quart is a larger volume, and the imperial fluid ounce is a slightly smaller unit. Both are called a quart.
Quick reference
1 quart in fluid ounces, by region
| United States | 32 fluid ounces |
| UK / imperial (250 ml cup) | 40 fluid ounces |
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Questions
Frequently asked questions
How many ounces are in a quart?
There are 32 fluid ounces in a US quart, and 40 in the UK/imperial equivalent. American recipes mean the US figure.
Is a quart 32 oz?
A US quart is 32 fluid ounces. Note that this is volume — 32 fl oz of water weighs about 33 oz, and 32 fl oz of oil weighs about 30, because weight depends on what is in the container.
How many ounces in half a quart?
Sixteen US fluid ounces, which is also one US pint or two cups.
Why does my UK recipe give a different number?
The imperial quart is 40 imperial fluid ounces. If a recipe is British or from an older Canadian or Australian book, assume imperial unless it says otherwise.
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