Enter a value in fluid ounces and choose your cup type (US, Imperial, or Metric) to get an instant conversion. The Ounces to Cups Converter shows you the equivalent cups result along with a handy reference for common fractions. Works for water, milk, oil, and other kitchen liquids.
Cups
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Fluid Ounces per Cup
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Milliliters (ml)
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Tablespoons
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One US cup equals 8 fluid ounces (fl oz). This is the most common cup standard used in American recipes. To convert fl oz to cups, simply divide the number of fluid ounces by 8.
To convert fluid ounces to US cups, divide the number of fluid ounces by 8. For example, 16 fl oz ÷ 8 = 2 cups. For Imperial cups, divide by approximately 10; for Metric cups (250 ml), divide by about 8.45.
6 fluid ounces equals 0.75 US cups, or three-quarters of a cup. In Imperial cups, 6 fl oz is about 0.6 cups, and in Metric cups it is approximately 0.709 cups.
Three US cups equals 24 fluid ounces. If you are using Imperial cups, 3 cups equals approximately 30 fl oz, and 3 Metric cups equals about 25.36 fl oz.
No — cup sizes vary by country and standard. A US customary cup holds 8 fl oz (236.6 ml), a US legal cup holds exactly 240 ml, an Imperial cup (used in the UK and Canada historically) holds about 284.1 ml, and a Metric cup (used in Australia and Canada) holds 250 ml. Always check which cup standard your recipe uses.
Fluid ounces (fl oz) measure volume, while dry ounces measure weight/mass. When a recipe says '8 fl oz of water', it means volume. When it says '4 oz of flour', it typically means weight. The two are not directly interchangeable because different ingredients have different densities.
To convert US cups to fluid ounces, multiply the number of cups by 8. For example, 2.5 cups × 8 = 20 fl oz. For Imperial cups, multiply by about 10; for Metric cups, multiply by approximately 8.454.
There are 2 US tablespoons in 1 US fluid ounce. So 8 fl oz (1 cup) contains 16 tablespoons. This relationship holds for the US system; Imperial tablespoons differ slightly.