Convert volume units — liters, gallons, cups, milliliters, cubic meters, pints, quarts.
| Unit | Name | Value |
|---|---|---|
| L | Liter | 0.0295735 |
| mL | Milliliter | 29.5735 |
| m³ | Cubic Meter | 0.0000295735 |
| gal(US) | US Gallon | 0.0078124959 |
| gal(UK) | UK Gallon | 0.0065052606 |
| qt | US Quart | 0.031249967 |
| pt | US Pint | 0.0625 |
| cup | US Cup | 0.125 |
Common fluid ounce values converted to us cup — factor: 1 fl oz = 0.125 cup
| Fluid Ounce (fl oz) | US Cup (cup) | Context |
|---|---|---|
| 0.5 fl oz | 0.0625 cup | Half ounce |
| 1 fl oz | 0.125 cup | Shot |
| 2 fl oz | 0.25 cup | Double shot |
| 4 fl oz | 0.5 cup | Half cup |
| 6 fl oz | 0.75 cup | One cup |
| 8 fl oz | 1 cup | One cup |
| 12 fl oz | 1.5 cup | Soda can |
| 16 fl oz | 2 cup | One pint |
| 20 fl oz | 2.5 cup | Large cup |
| 32 fl oz | 4 cup | One quart |
| 64 fl oz | 8 cup | Half gallon |
| 128 fl oz | 16 cup | One gallon |
| 256 fl oz | 32 cup | 2 gallons |
| 512 fl oz | 64 cup | 4 gallons |
| 1,024 fl oz | 128 cup | 8 gallons |
Converting fluid ounce to us cup comes up frequently in cooking, chemistry, medicine, and engineering. A recipe written in metric units may need to be adapted for a kitchen using us cup, or a laboratory protocol may specify volumes in fluid ounce that need to be measured with equipment calibrated in us cup.
In everyday use, knowing that 5 fl oz = 0.625 cup and 10 fl oz = 1.25 cup covers most common situations. For bulk calculations, 100 fl oz = 12.5 cup is a useful anchor. The reverse conversion — us cup back to fluid ounce — uses the factor 8, so 1 cup = 8 fl oz.
All conversions use the internationally recognized factor of exactly 1 fl oz = 0.125 cup. Calculations are performed in IEEE 754 double-precision floating point, giving accuracy to at least 8 significant figures — more than sufficient for any practical application.
Formula: US Cup = Fluid Ounce × 0.125
Multiply any fluid ounce value by 0.125 to get us cup. One fluid ounce equals 0.125 cup.
Reverse: Fluid Ounce = US Cup × 8
Fluid ounces ÷ 8 = cups. Eight fl oz = one cup.
16 fl oz = 2 cups = 1 pint. 32 fl oz = 4 cups = 1 quart.
Cups × 8 = fl oz.
Labels product nutrition facts and serving sizes in fluid ounces as required by FDA.
Measures spirit pours and mixers in fl oz using jiggers for cocktail consistency.
Tracks soda fountain syrup and cup sizes (12, 16, 20, 32 fl oz) for inventory.
Designs bottle fill levels in fluid ounces for US retail compliance.
Recommends daily fluid intake for children in fluid ounces by age group.
Compares unit prices per fluid ounce on beverage labels to find the best value.
The US fluid ounce is defined as 1/128 of a US gallon, exactly 29.5735 mL. The US and UK fl oz differ: the US is 29.57 mL while the Imperial fl oz is 28.41 mL.
Fluid ounces appear on every US beverage container: a soda can is 12 fl oz, a water bottle is 16.9 fl oz, and a US shot glass is 1.5 fl oz.
Interesting fact: Despite sharing the name 'ounce', the fluid ounce measures volume, not weight. One fl oz of water weighs about 1.04 oz, but one fl oz of honey weighs about 1.5 oz.
The US customary cup is defined as exactly 8 US fluid ounces, or 236.588 mL. It was standardized by Fannie Farmer in her 1896 cookbook The Boston Cooking-School Cook Book.
The cup is the backbone of US baking: nearly every American recipe uses cup measurements for flour, sugar, butter, and liquids. Standard sets include 1 cup, ½ cup, ⅓ cup, and ¼ cup.
Interesting fact: Australia uses a metric cup of 250 mL, slightly larger than the US cup, which can cause recipe confusion in international cooking.