Fluid Ounce to Cup Converter | Converter Tools Kit

Fluid Ounce to Cup Converter

Quickly and accurately convert volume measurements from fluid ounces to cups with our free online Fluid Ounce to Cup Converter. Perfect for cooking, baking, and recipe conversions.

Convert

fl oz
cup
Result
Precision: 9 decimal places
1 fluid ounce = 0.125 cups

1 US fluid ounce = 0.125 US cups

Common Conversions

US Fluid Ounces (fl oz) US Cups
1 fl oz 0.125 cup
2 fl oz 0.25 cup (1/4 cup)
4 fl oz 0.5 cup (1/2 cup)
6 fl oz 0.75 cup (3/4 cup)
8 fl oz 1 cup
12 fl oz 1.5 cups
16 fl oz 2 cups (1 pint)
32 fl oz 4 cups (1 quart)

How It Works

Converting from fluid ounces to cups is a common volume conversion, especially in cooking and baking when following recipes from different regions or scaling recipes up or down.

Conversion Formula:

1 US fluid ounce = 0.125 US cups

To convert US fluid ounces to US cups, divide the fluid ounce value by 8 (or multiply by 0.125):

US Cups = US Fluid Ounces ÷ 8 = US Fluid Ounces × 0.125

Example Calculation:

To convert 12 US fluid ounces to US cups:

US Cups = 12 fl oz ÷ 8 = 12 fl oz × 0.125 = 1.5 cups

Our converter handles this calculation automatically and provides results with up to 9 decimal places for precision. It also formats the result to remove unnecessary trailing zeros for better readability.

US Customary Volume Measurement Hierarchy:

  • 1 gallon = 4 quarts
  • 1 quart = 2 pints
  • 1 pint = 2 cups
  • 1 cup = 8 fluid ounces
  • 1 fluid ounce = 2 tablespoons
  • 1 tablespoon = 3 teaspoons

Frequently Asked Questions

What is a US fluid ounce?

A US fluid ounce (fl oz) is a unit of volume in the US customary system, equal to approximately 29.5735 milliliters. It’s widely used in the United States for measuring liquids, especially in cooking, beverages, and for packaging certain products.

What is a US cup?

A US cup is a unit of volume in the US customary system, equal to 8 US fluid ounces or approximately 236.588 milliliters. It’s widely used in cooking and baking, especially in the United States and Canada, for measuring ingredients in recipes.

What’s the difference between US and UK fluid ounces and cups?

The US fluid ounce (29.5735 mL) is different from the UK (imperial) fluid ounce (28.4131 mL). Similarly, the US cup (236.588 mL) is different from the UK cup (284.131 mL). This converter uses US measurements, which are standard in the United States.

Why would I need to convert fluid ounces to cups?

This conversion is commonly needed when following recipes that use different units of measurement, scaling recipes up or down, or when you have measuring tools in one unit but need to measure in another. For example, if a recipe calls for 16 fluid ounces of liquid but you want to know how many cups that is for easier measuring.

How accurate is this converter?

Our converter uses the standard conversion factor of 0.125 cups per fluid ounce, which is exact in the US customary system. The calculator can display results with up to 9 decimal places for high precision needs, though for this particular conversion, decimal places beyond the third are rarely needed since the conversion is a simple division by 8.

How do I convert cups back to fluid ounces?

To convert from US cups to US fluid ounces, multiply the cup value by 8. Alternatively, you can use our Cup to Fluid Ounce Converter for quick and accurate conversions.