Converters

Cups to Ounces Converter

Convert US cups to fluid ounces instantly for cooking, baking, and recipe measurements.

Enter a value above to see the conversion.

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Cups to Fluid Ounces Formula

Multiply cups by 8 to convert to US fluid ounces.

fl oz = Cups × 8

Example: 1.5 cups × 8 = 12 fl oz

About the Cups to Ounces Conversion

Cups and fluid ounces are both US customary volume units used in cooking. One US cup equals exactly 8 fluid ounces, making the conversion a simple multiplication. This relationship is used constantly when reading recipes, measuring liquids, or comparing beverage serving sizes.

Keep in mind that this converter is for US measurements. Metric and imperial cup sizes differ slightly — a metric cup is 250 mL (≈ 8.45 fl oz) versus the US cup of 236.6 mL (exactly 8 fl oz). Most online recipes use US cups unless explicitly stated otherwise.

Frequently asked questions

How many fluid ounces are in a cup?
One US cup equals exactly 8 US fluid ounces. To convert cups to fluid ounces, multiply the number of cups by 8. For example, 2 cups × 8 = 16 fl oz, and 0.5 cups × 8 = 4 fl oz. This exact relationship makes scaling US recipes straightforward and predictable.
How do I convert cups to fluid ounces?
Multiply the number of cups by 8 to get the equivalent in fluid ounces. The formula is: fl oz = Cups × 8. For example, 1.5 cups × 8 = 12 fl oz, and 3 cups × 8 = 24 fl oz. This is the standard US customary relationship between cups and fluid ounces.
How many ounces is 2 cups?
2 cups equals exactly 16 fluid ounces (2 × 8 = 16). This is also equivalent to 1 US pint or approximately 473 mL. Many standard beverage containers and recipe portions are sized around 16 fl oz, making this one of the most practical cooking measurements to know.
How many ounces is 3/4 cup?
Three-quarters of a cup equals 6 fluid ounces (0.75 × 8 = 6). This measurement appears frequently in baking recipes for ingredients like butter, milk, or oil. Knowing that 3/4 cup equals 6 fl oz helps when using measuring cups or a kitchen scale for more precise baking.
Does this converter work for both liquid and dry cups?
This converter handles fluid ounces and liquid cup measurements. Dry cups (for flour, sugar, etc.) use the same cup volume unit in the US, but the weight in ounces varies by ingredient density. For example, one cup of flour weighs about 4.5 oz while one cup of sugar weighs about 7 oz. Use a kitchen scale for accurate dry ingredient weights.

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