20 Oz to Cups
20 US fluid ounces equals 2.5 US cups (2 1/2 cup). Change the amount, swap units, or copy the result. Fluid volume only, not weight ounces.
Best solution
Default conversion: 20 US fl oz is 2 1/2 cup (2.5 cups); 40 US tbsp / approximately 591.47 mL.
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Calculation for 20 US fl oz
20 US fl oz ÷ 8 = 2.5 US cups = 2 1/2 cup. 20 US fl oz × 2 = 40 US tablespoons.
The cup fraction is exact for this whole-number fluid-ounce input. The milliliter equivalent is 20 × 29.5735295625, rounded to 591.47 mL. Weight ounces require ingredient-specific data and are not converted here.
All volume units in this converter are US customary units. The primary decimal is rounded to four places and milliliters to two. For arbitrary inputs, the displayed cup fraction is a nearby fraction with a denominator up to 16, not necessarily an exact equivalent. This does not convert weight ounces or Imperial fluid ounces. NIST unit conversion reference.
Real-World Context & Technical Standards
Standard 20 oz Soda Bottle
Single-serve plastic bottles of Coca-Cola, Pepsi, and Mountain Dew in vending machines and coolers hold exactly 20 fluid ounces (591 mL).
Starbucks Venti Hot Cup
At Starbucks, the 'Venti' size for hot espresso and brewed coffee drinks is calibrated to hold exactly 20 fluid ounces.
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Frequently Asked Questions
How many cups is 20 oz of liquid?
There are 8 fluid ounces in 1 US cup. Dividing 20 by 8 gives 2.5 cups (or 2 1/2 cup).
How many tablespoons is 20 fl oz?
Each US fluid ounce equals 2 US tablespoons. Therefore, 20 US fl oz = 40 US tablespoons.
Can I convert 20 ounces by weight to cups here?
No. This tool converts volume, not mass. If 20 oz is a scale reading or a package's net weight, cups depend on the ingredient's density. A volume measured in US fluid ounces still follows the same volume ratio, regardless of the ingredient.
Does this use a metric cup or Imperial fluid ounce?
Neither. This tool uses US customary cups and US fluid ounces. Check the unit system in your recipe before using the result; different cup or fluid-ounce definitions are not interchangeable.