Ounces to Cups Converter
Convert ounces to cups for liquids and dry ingredients. Whether you've got fluid ounces of milk or weight ounces of flour, this tool handles both — because they work differently and it's worth understanding why.
Quick reference: All-purpose flour
125g
= 1 cup
7.81g
= 1 tbsp
2.6g
= 1 tsp
4.41oz
= 1 cup
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Try MealMatics FreeFluid Ounces vs. Weight Ounces: The Difference That Trips Everyone Up
If you've ever been confused by the word 'ounce' in a recipe, you're not alone. There are two completely different things both called ounces: fluid ounces (fl oz), which measure volume — how much space something takes up — and weight ounces (oz), which measure mass — how heavy something is. For water, these happen to be almost the same (1 fl oz of water weighs almost exactly 1 oz), which is why so many people assume they're always interchangeable. They're not. 1 fluid ounce of oil weighs about 0.9 ounces by weight. 1 fluid ounce of honey weighs over 1.5 ounces because honey is much denser than water. So when a recipe says '4 ounces of cream,' it almost certainly means fluid ounces — a volume measurement. When it says '4 ounces of flour,' it means weight. These are completely different amounts, and using the wrong interpretation is a recipe for disaster.
In terms of cups, the conversion for fluid ounces is simple and fixed: 1 US cup holds exactly 8 fluid ounces, so dividing by 8 always gives you cups. 4 fl oz = ½ cup. 16 fl oz = 2 cups. 32 fl oz = 4 cups (1 quart). For weight ounces of dry ingredients, you have to account for density. 8 ounces (by weight) of water fills exactly 1 cup. But 8 ounces of flour fills about 1.8 cups, because flour is much lighter — it takes more of it to reach the same weight. Our converter handles both cases. For liquids, it uses the standard fluid ounce formula. For dry ingredients, it uses density data to give you an accurate cup equivalent. Whether you're scaling a cocktail recipe, measuring broth for soup, or trying to match a US recipe that uses weight ounces for flour, you'll get the right answer here.
Ounces to Cups — Quick Reference Chart
| Fluid Ounces | Cups | Fraction | mL |
|---|---|---|---|
| 1 fl oz | ⅛ cup | 0.125 cup | 29.6 ml |
| 2 fl oz | ¼ cup | 0.25 cup | 59.1 ml |
| 4 fl oz | ½ cup | 0.5 cup | 118.3 ml |
| 6 fl oz | ¾ cup | 0.75 cup | 177.4 ml |
| 8 fl oz | 1 cup | 1 cup | 236.6 ml |
| 12 fl oz | 1½ cups | 1.5 cups | 354.9 ml |
| 16 fl oz | 2 cups | 2 cups | 473.2 ml |
| 24 fl oz | 3 cups | 3 cups | 709.8 ml |
| 32 fl oz | 4 cups | 4 cups | 946.4 ml |
| 64 fl oz | 8 cups | 8 cups | 1892.7 ml |
Frequently Asked Questions
How many ounces are in 1 cup?
1 US cup equals exactly 8 fluid ounces. This is a fixed conversion that never changes for liquids. For dry ingredients measured by weight, it depends on the ingredient — 1 cup of flour is about 4.4 oz, while 1 cup of sugar is about 7.1 oz.
What's the difference between fluid ounces and weight ounces?
Fluid ounces (fl oz) measure volume — how much space a liquid takes up. Weight ounces measure mass — how heavy something is. For water, they're nearly the same (1 fl oz ≈ 1 oz by weight), but for most other ingredients they differ significantly.
My recipe says "8 oz of flour" — is that weight or volume?
Almost certainly weight (mass) ounces, since flour is typically measured by weight in serious recipes. 8 oz of flour by weight is about 1¾ cups. If it said "8 fl oz of flour," that would be 1 cup — but that phrasing is unusual for dry ingredients.
How do I convert fluid ounces to cups?
Divide fluid ounces by 8. So 4 fl oz = ½ cup, 8 fl oz = 1 cup, 16 fl oz = 2 cups. This works for any liquid.
Does this converter work for milk, juice, and other liquids?
Yes. All thin liquids (water, milk, juice, broth, most oils) convert at the standard rate of 8 fl oz per cup. Thick liquids like honey, molasses, and syrups are denser, so their weight ounces will differ from fluid ounces.
What is a US cup in ounces versus a UK cup?
A US cup is 8 fl oz (236.6 ml). The UK and most Commonwealth countries use either a metric cup (250 ml ≈ 8.45 fl oz) or the imperial cup (284 ml ≈ 10 fl oz). This converter uses the US cup standard.