Liquid Oz to Cups Converter
fl oz
cups
Quick Conversions
Conversion Formula
Converting fluid ounces to cups is straightforward. Since one cup equals 8 fluid ounces, you simply divide the number of fluid ounces by 8.
Cups = Fluid Ounces ÷ 8
or equivalently: 1 fl oz = 0.125 cups
Step-by-Step Examples
Example 1: Convert 16 fl oz to cups
Step 1: Take the fluid ounce value: 16 fl oz
Step 2: Divide by 8: 16 ÷ 8 = 2
Result: 16 fl oz = 2 cups
Example 2: Convert 6 fl oz to cups
Step 1: Take the fluid ounce value: 6 fl oz
Step 2: Divide by 8: 6 ÷ 8 = 0.75
Result: 6 fl oz = 0.75 cups (or 3/4 cup)
Example 3: Convert 20 fl oz to cups
Step 1: Take the fluid ounce value: 20 fl oz
Step 2: Divide by 8: 20 ÷ 8 = 2.5
Result: 20 fl oz = 2.5 cups
Conversion Table
Use this comprehensive table for quick reference when converting between fluid ounces and cups.
| Fluid Ounces (fl oz) | Cups (Decimal) | Cups (Fraction) |
|---|---|---|
| 1 fl oz | 0.125 cups | 1/8 cup |
| 2 fl oz | 0.25 cups | 1/4 cup |
| 3 fl oz | 0.375 cups | 3/8 cup |
| 4 fl oz | 0.5 cups | 1/2 cup |
| 5 fl oz | 0.625 cups | 5/8 cup |
| 6 fl oz | 0.75 cups | 3/4 cup |
| 7 fl oz | 0.875 cups | 7/8 cup |
| 8 fl oz | 1 cup | 1 cup |
| 10 fl oz | 1.25 cups | 1 1/4 cups |
| 12 fl oz | 1.5 cups | 1 1/2 cups |
| 16 fl oz | 2 cups | 2 cups |
| 20 fl oz | 2.5 cups | 2 1/2 cups |
| 24 fl oz | 3 cups | 3 cups |
| 32 fl oz | 4 cups | 4 cups |
| 40 fl oz | 5 cups | 5 cups |
| 48 fl oz | 6 cups | 6 cups |
| 64 fl oz | 8 cups | 8 cups |
| 128 fl oz | 16 cups | 16 cups |
Popular Conversions
These are the most commonly used conversions in cooking and baking:
4 fl oz
= 0.5 cups (1/2 cup)
8 fl oz
= 1 cup
16 fl oz
= 2 cups
32 fl oz
= 4 cups (1 quart)
6 fl oz
= 0.75 cups (3/4 cup)
12 fl oz
= 1.5 cups (1 1/2 cups)
Pro Tip: When measuring liquids, always use liquid measuring cups with spouts. These provide more accurate measurements than dry measuring cups.
Related Volume Conversions
Fluid ounces and cups can be converted to various other volume units:
From Fluid Ounces
Milliliters (mL)
1 fl oz = 29.5735 mL
Liters (L)
1 fl oz = 0.0296 L
Tablespoons (tbsp)
1 fl oz = 2 tbsp
Teaspoons (tsp)
1 fl oz = 6 tsp
Pints (pt)
1 fl oz = 0.0625 pt
Quarts (qt)
1 fl oz = 0.03125 qt
Gallons (gal)
1 fl oz = 0.0078 gal
From Cups
Milliliters (mL)
1 cup = 236.588 mL
Liters (L)
1 cup = 0.237 L
Tablespoons (tbsp)
1 cup = 16 tbsp
Teaspoons (tsp)
1 cup = 48 tsp
Pints (pt)
1 cup = 0.5 pt
Quarts (qt)
1 cup = 0.25 qt
Gallons (gal)
1 cup = 0.0625 gal
Different Cup Measurements Worldwide
The cup measurement varies across different regions and applications. Here are the main types:
US Legal Cup
240 mL – Used in nutrition labeling and recipes
US Customary Cup
236.588 mL – Traditional measurement
Metric Cup
250 mL – Used in Australia and New Zealand
Imperial Cup (UK)
284.13 mL – Half of an imperial pint
Japanese Cup
200 mL – Used for rice and sake
Coffee Cup
118 mL – Standard coffee measure
Note: This converter uses the US legal cup (240 mL), which is the standard for recipes and nutrition labeling in the United States. When following recipes, always check which cup measurement system is being used.
Frequently Asked Questions
How many fluid ounces are in one cup?
One cup contains exactly 8 fluid ounces. This is the standard conversion used in US cooking and baking. Therefore, 2 cups equal 16 fl oz, 3 cups equal 24 fl oz, and 4 cups equal 32 fl oz (which is also 1 quart).
How do I convert 12 fl oz to cups?
To convert 12 fluid ounces to cups, divide 12 by 8. The result is 1.5 cups, which can also be expressed as 1 and 1/2 cups. This calculation works for any fluid ounce value: simply divide by 8 to get the cup equivalent.
Is a fluid ounce the same as a regular ounce?
No, fluid ounces and regular ounces measure different things. Fluid ounces measure volume (how much space a liquid takes up), while regular ounces measure weight (how heavy something is). One fluid ounce of water weighs approximately 1.04 ounces, but this varies for different substances.
What is 16 fl oz in cups?
16 fluid ounces equals exactly 2 cups. This is a common measurement since 16 fl oz also equals 1 pint. Many beverages are sold in 16 fl oz containers, which is equivalent to 2 standard measuring cups.
How many cups is 32 fl oz?
32 fluid ounces equals 4 cups. This is also equivalent to 1 quart or 2 pints. This measurement is commonly used for larger beverage containers and in recipes that require substantial liquid quantities.
Can I use this conversion for dry ingredients?
This conversion is specifically for liquid measurements. While the volume equivalents remain the same, dry ingredients should be measured using dry measuring cups for accuracy. Different dry ingredients have different densities, so weight measurements (ounces or grams) are more reliable for dry goods.
What is 6 fl oz in cups?
6 fluid ounces equals 0.75 cups, which is the same as 3/4 cup. This is a common measurement in recipes. To convert, divide 6 by 8 to get 0.75, or think of it as three-quarters of the 8 fl oz that make up one full cup.
How accurate does my measurement need to be?
For most cooking purposes, measuring to the nearest 1/4 cup is sufficient. However, baking often requires more precision since it involves chemical reactions. In professional baking, weight measurements (using a kitchen scale) are preferred over volume measurements for better consistency.