US Fluid Ounce to US Cup Conversion Chart
| US Fluid Ounce (fl oz) | US Cup (cup) | Reference Benchmark | Formula Step |
|---|---|---|---|
| 4 fl oz | 0.492892 cup | Four-Ounce Pediatric Feeding Formula Bottle Measure | 4 × 0.123223 = 0.492892 cup-us |
| 6 fl oz | 0.739338 cup | Six-Ounce Traditional Bone China Teacup Serving | 6 × 0.123223 = 0.739338 cup-us |
| 8 fl oz | 0.985784 cup | Eight-Ounce Half-Pint School Milk Paper Carton | 8 × 0.123223 = 0.985784 cup-us |
| 10 fl oz | 1.23223 cup | Ten-Ounce Ceramic Coffee Mug Morning Beverage | 10 × 0.123223 = 1.23223 cup-us |
| 12 fl oz | 1.478676 cup | Standard Twelve-Ounce Beverage Aluminum Drink Can | 12 × 0.123223 = 1.478676 cup-us |
| 16 fl oz | 1.971569 cup | One-Pint Sixteen-Ounce Craft Beer Draft Glass | 16 × 0.123223 = 1.971569 cup-us |
| 20 fl oz | 2.464461 cup | Twenty-Ounce Large Stadium Soft Drink Paper Cup | 20 × 0.123223 = 2.464461 cup-us |
| 24 fl oz | 2.957353 cup | Twenty-Four-Ounce Insulated Stainless Hydration Flask | 24 × 0.123223 = 2.957353 cup-us |
| 32 fl oz | 3.943137 cup | One-Quart Thirty-Two-Ounce Motor Oil Bottle Container | 32 × 0.123223 = 3.943137 cup-us |
| 40 fl oz | 4.928922 cup | Forty-Ounce Commercial Glass Malt Beverage Bottle | 40 × 0.123223 = 4.928922 cup-us |
| 48 fl oz | 5.914706 cup | Three-Pint Ceramic Teapot Beverage Serving Capacity | 48 × 0.123223 = 5.914706 cup-us |
| 64 fl oz | 7.886275 cup | Half-Gallon Sixty-Four-Ounce Glass Brewery Growler | 64 × 0.123223 = 7.886275 cup-us |
| 80 fl oz | 9.857843 cup | Eighty-Ounce Insulated Beverage Server Pot | 80 × 0.123223 = 9.857843 cup-us |
| 96 fl oz | 11.829412 cup | Ninety-Six-Ounce Commercial Coffee Catering Caddy | 96 × 0.123223 = 11.829412 cup-us |
| 128 fl oz | 15.772549 cup | One-Gallon Full Fluid Milk Polyethylene Container | 128 × 0.123223 = 15.772549 cup-us |
US Fluid Ounce to US Cup Formula & Unit Definitions
One US fluid ounce equals approximately 0.123223 US legal cups (29.5735295625 / 240). To convert US fluid ounces to US cups, multiply by 0.123223 (or divide by 8.11537). Conversely, to convert US cups to US fluid ounces, multiply by 8.11537.
Quick Estimation: Divide fluid ounces by 8 for a quick culinary estimate. For instance, 16 fl oz is 2 cups.
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.
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.
Frequently Asked Questions
Q.How many US cups are in one US fluid ounce?
There is approximately 0.123223 US legal cup in one US fluid ounce (or exactly 0.125 US customary cup).
Q.What is the formula to convert US fluid ounces to US cups?
The formula is: US Cups = US Fluid Ounces × 0.123223 (or divided by 8.11537). For example, 16 fl oz × 0.123223 ≈ 1.97 cups.
Q.How do I reverse this calculation from US cups to US fluid ounces?
To convert US cups back to US fluid ounces, multiply by 8.11537. You can also use our US Cup to US Fluid Ounce Converter.
Q.Is 8 fluid ounces always 1 cup?
In traditional American home cooking, 8 fluid ounces is exactly 1 cup. On FDA nutrition panels, 1 legal cup is 240 mL (8.115 fl oz).