🍳 Cup (US) to Fluid Ounce Converter

Convert Cup (US) (cup_us) to Fluid Ounce (fl_oz) instantly. Recipe measurement conversion.

1 unit =
From
To
Formula1 cup US = 8 fl oz
UnitNameValue
cup_metricCup (Metric)
tbspTablespoon
tspTeaspoon
mlMillilitre
lLitre
fl_ozFluid Ounce
pintPint (US)

Quick Reference

1 cup = 8 fl oz

¼ cup
2 fl oz
⅓ cup
2.664 fl oz
½ cup
4 fl oz
¾ cup
6 fl oz
1 cup
8 fl oz
2 cup
16 fl oz

Reverse: fl oz × 0.125 = cup

Worked Examples

0.25 cup
0.25 cup = 2 fl oz
0.25 cup in fluid ounce
0.5 cup
0.5 cup = 4 fl oz
0.5 cup in fluid ounce
1 cup
1 cup = 8 fl oz
1 cup in fluid ounce
2 cup
2 cup = 16 fl oz
2 cup in fluid ounce

Common Cooking Measures

Factor: 1 cup = 8 fl oz

Cup (US) (cup)Fluid Ounce (fl oz)Common Measure
0.0052 cup0.0417 fl oz¼ tsp
0.0104 cup0.0833 fl oz½ tsp
0.0208 cup0.1667 fl oz1 tsp
0.0625 cup0.5 fl oz1 tbsp
0.125 cup1 fl oz2 tbsp (⅛ cup)
0.25 cup2 fl oz¼ cup
0.3333 cup2.667 fl oz⅓ cup
0.5 cup4 fl oz½ cup
0.6667 cup5.333 fl oz⅔ cup
0.75 cup6 fl oz¾ cup
1 cup8 fl oz1 cup
2 cup16 fl oz1 pint (2 cups)
4 cup32 fl oz1 quart (4 cups)
2.113 cup16.91 fl oz½ litre
4.227 cup33.81 fl oz1 litre

Quick Tricks

Exact factor

1 cup = 8 fl oz.

US cup chain

1 cup = 16 tbsp = 48 tsp = 8 fl oz = 236.6 ml = ½ pint.

Reverse

fl oz × 0.125 = cup.

Who Uses This Converter?

Home Baker

Converts between cups, tablespoons, teaspoons, and millilitres when following recipes from different countries.

International Recipe Follower

Converts US cups to metric ml when cooking from American cookbooks with a European kitchen.

Nutritionist

Calculates exact portion sizes in ml or fl oz from recipe measurements for dietary analysis.

Bartender

Converts between fl oz, ml, and tablespoons for cocktail recipe scaling.

Caterer

Scales recipes up to litres for large-batch cooking from cup-based recipes.

Food Blogger

Provides both cup and ml measurements in recipes to serve both US and international audiences.

Frequently Asked Questions

About Cup (US) and Fluid Ounce

Cup (US)

The US cup is defined as exactly 236.588 mL (8 US fl oz). It is the standard volume measure in American recipes and has been used since the late 19th century, when standardized cooking measures were promoted by domestic science educators like Fannie Farmer.

The US cup = 16 US tablespoons = 48 US teaspoons = 8 fl oz = ½ US pint. American baking relies heavily on cup measures for both liquid and dry ingredients, though professional bakers prefer weight for precision.

Interesting fact: Fannie Farmer's 1896 'Boston Cooking-School Cook Book' was the first to insist on level measurements (not heaped) using standardized cups and spoons, revolutionizing recipe writing and making cooking reproducible for home cooks.

Fluid Ounce

The US fluid ounce (fl oz) is defined as exactly 29.5735 mL (1/128 US gallon). It is used in American recipes, bartending, and beverage labelling. The Imperial fluid ounce (28.41 mL) is slightly smaller.

US fl oz appears on all American food and beverage labels. Common measures: 1 shot = 1.5 fl oz (44 mL); standard beer = 12 fl oz (355 mL); wine pour = 5 fl oz (148 mL); US cup = 8 fl oz.

Interesting fact: The US and UK fluid ounces are defined differently: 1 US fl oz = 29.574 mL; 1 UK fl oz = 28.413 mL. A US pint (16 fl oz) ≠ UK pint (20 fl oz). This causes significant confusion in cocktail recipes shared between countries.

About Cup (US) to Fluid Ounce Conversion

The US cup chain: 1 cup = 16 tbsp = 48 tsp = 8 fl oz = 236.6 ml = ½ pint. Note: metric cups (Australia) = 250 ml; UK tablespoon = 17.76 ml vs US 14.79 ml. Always check which measurement system a recipe uses.

Factor: 1 cup = 8 fl oz. Reverse: fl oz × 0.125 = cup.