What Is the Fluid Ounces to Cups Converter?
This tool converts US fluid ounces (fl oz) into US cups, a common need when scaling recipes, measuring liquids, or following instructions written in different units. In the US customary system, one cup equals exactly 8 fluid ounces, so the conversion is a simple division.
How to Use It
Enter the volume in fluid ounces and the calculator instantly returns the equivalent in cups. For example, 16 fl oz becomes 2 cups, and 4 fl oz becomes 0.5 cups. The result is shown with up to two decimal places so partial cups stay precise.
The Formula Explained
The conversion uses $$\text{Cups} = \frac{\text{Fluid Ounces (fl oz)}}{8}$$. Because there are 8 US fluid ounces in 1 US cup, dividing your ounce measurement by 8 gives the number of cups. To go the other direction, multiply cups by 8 to get fluid ounces.
Worked Example
Suppose a recipe calls for 12 fluid ounces of milk and you want to measure it in cups. Apply the formula: $$12 \div 8 = 1.5 \text{ cups}.$$ So 12 fl oz equals one and a half cups.
FAQ
Is this US or UK ounces? This converter uses US customary units, where 1 cup = 8 US fluid ounces. UK/imperial measures differ slightly.
How many fluid ounces are in a cup? Exactly 8 US fluid ounces make 1 US cup.
What is 8 fl oz in cups? \(8 \div 8 = 1\), so 8 fluid ounces equals exactly 1 cup.
