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How many ounces are in a cup?

💡 Everyday · updated 4 weeks ago · 2 min read
How many ounces are in a cup?
Short answerA US cup holds 8 fluid ounces, but that is volume, not weight.

In US cooking, 1 cup equals 8 fluid ounces. That is a volume measure, so it tells you how much space the liquid takes up, not how much it weighs.

That distinction matters because 8 fluid ounces of water and 8 fluid ounces of honey do not weigh the same thing. Recipe conversions get messy when people mix volume and weight like they are interchangeable.

If you are cooking, remember the clean rule: 1 cup = 8 fluid ounces. If you are weighing ingredients, use grams or ounces by weight instead.

Sources

NIST - SI Units

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