US Cup to US Fluid Ounce Conversion Chart
| US Cup (cup) | US Fluid Ounce (fl oz) | Reference Benchmark | Formula Step |
|---|---|---|---|
| 0.5 cup | 4.05768 fl oz | Half-Cup Standard Culinary Baking Recipe Measure | 0.5 × 8.11537 = 4.05768 fl-oz-us |
| 1 cup | 8.11537 fl oz | Exact One-US-Legal-Cup FDA Nutrition Facts Measure | 1 × 8.11537 = 8.11537 fl-oz-us |
| 1.5 cup | 12.17305 fl oz | One-and-a-Half-Cup Ceramic Soup Mug Capacity | 1.5 × 8.11537 = 12.17305 fl-oz-us |
| 2 cup | 16.23073 fl oz | Two-Cup One-Pint Glass Liquid Measuring Pitcher | 2 × 8.11537 = 16.23073 fl-oz-us |
| 2.5 cup | 20.28841 fl oz | Two-and-a-Half-Cup Artisan Bread Dough Water Measure | 2.5 × 8.11537 = 20.28841 fl-oz-us |
| 3 cup | 24.3461 fl oz | Three-Cup Household Electric Rice Cooker Pot | 3 × 8.11537 = 24.3461 fl-oz-us |
| 4 cup | 32.46146 fl oz | Four-Cup One-Quart High-Precision Kitchen Pitcher | 4 × 8.11537 = 32.46146 fl-oz-us |
| 5 cup | 40.57683 fl oz | Five-Cup Small Countertop Drip Coffee Maker Carafe | 5 × 8.11537 = 40.57683 fl-oz-us |
| 6 cup | 48.69219 fl oz | Six-Cup Heritage Bundt Cake Batter Formulation | 6 × 8.11537 = 48.69219 fl-oz-us |
| 8 cup | 64.92292 fl oz | Eight-Cup Two-Quart Ceramic Casserole Saucepan | 8 × 8.11537 = 64.92292 fl-oz-us |
| 10 cup | 81.15365 fl oz | Ten-Cup Electric Thermal Coffee Machine Pot | 10 × 8.11537 = 81.15365 fl-oz-us |
| 12 cup | 97.38439 fl oz | Twelve-Cup Countertop Food Processor Work Bowl | 12 × 8.11537 = 97.38439 fl-oz-us |
| 16 cup | 129.84585 fl oz | One-Gallon Sixteen-Cup Commercial Mixing Bucket | 16 × 8.11537 = 129.84585 fl-oz-us |
| 20 cup | 162.30731 fl oz | Twenty-Cup Large Catering Stainless Steel Urn | 20 × 8.11537 = 162.30731 fl-oz-us |
| 24 cup | 194.76877 fl oz | Twenty-Four-Cup Domestic Party Punch Bowl | 24 × 8.11537 = 194.76877 fl-oz-us |
US Cup to US Fluid Ounce Formula & Unit Definitions
One US legal cup equals approximately 8.11537 US fluid ounces (240 / 29.5735295625). To convert US legal cups to US fluid ounces, multiply by 8.11537. Conversely, to convert US fluid ounces to US legal cups, divide by 8.11537 (or multiply by 0.123223). Note that a traditional customary cup equals exactly 8.00 fl oz.
Quick Estimation: A cup is basically 8 fluid ounces. Multiply by 8 for everyday home cooking. For exact nutrition panel calculations, add 1.4% (8.12 fl oz).
US Legal Cup Scale (cup)
FDA Statutory Nutritional Unit- Creator & Origin: Codified by the US FDA for standardized nutritional serving sizes.
- Standard Definition: Statutorily defined as exactly 240 cubic centimeters (240 mL).
- Everyday Focus: Baking ingredients, nutritional facts panels, and milk servings.
US Fluid Ounce Scale (fl oz)
US Statutory Liquid Unit- Creator & Origin: Derived from the historical English wine gallon (1/128th of a gallon).
- Standard Definition: Standardized by NIST as exactly 29.5735295625 cubic centimeters.
- Everyday Focus: Beverage cans, cosmetic bottles, cough syrups, and cocktail measures.
Frequently Asked Questions
Q.How many US fluid ounces are in one US cup?
One US legal nutrition cup equals approximately 8.11537 US fluid ounces (240 mL), while a traditional US customary cup equals exactly 8.00 US fluid ounces (236.59 mL).
Q.What is the formula to convert US cups to US fluid ounces?
The formula is: US Fluid Ounces = US Cups × 8.11537. For example, 2 cups × 8.11537 ≈ 16.23 fl oz.
Q.How do I reverse this calculation from US fluid ounces to US cups?
To convert US fluid ounces back to US cups, divide by 8.11537 (or multiply by 0.123223). You can also use our US Fluid Ounce to US Cup Converter.
Q.Is 8 fluid ounces always 1 cup?
In traditional American home cooking, yes (1 cup = 8 fl oz). In commercial food nutrition labeling under FDA rules, 1 legal cup is 240 mL (8.115 fl oz).