A US fluid ounce is 1/128 of a US gallon, equal to about 29.57 milliliters.
Fluid ounce to Cup
Convert Fluid ounce to Cup instantly. Free online cooking unit converter with exact formula, conversion table and FAQ.
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A US customary cup equals 236.5882365 milliliters, widely used in American recipes.
cup = fl oz × 0.125
Results update instantly for Fluid ounce to Cup conversions.
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Formula
cup = fl oz × 0.125
fl oz = cup × 8
Conversion table
| 1 fl oz | 0.125 cup |
| 5 fl oz | 0.625 cup |
| 10 fl oz | 1.25 cup |
| 20 fl oz | 2.5 cup |
| 50 fl oz | 6.25 cup |
| 100 fl oz | 12.5 cup |
| 500 fl oz | 62.5 cup |
| 1000 fl oz | 125 cup |
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Frequently asked questions
What is the source unit in this conversion?
The source unit is the fluid ounce (fl oz). A US fluid ounce is 1/128 of a US gallon, equal to about 29.57 milliliters.
What is the destination unit in this conversion?
The destination unit is the cup (cup). A US customary cup equals 236.5882365 milliliters, widely used in American recipes.
How do I convert fluid ounce to cup?
Multiply the fluid ounce value by 0.125. For example, 10 fl oz × 0.125 = 1.25 cup.
Is the fluid ounce to cup conversion exact?
Yes. This conversion uses a fixed factor defined for cooking measurement standards, so results are consistent every time.
Where is this conversion commonly used?
It's used when following recipes, adjusting ingredient quantities, or converting between US customary and metric cooking measurements.
Can I convert cup back to fluid ounce?
Yes. Multiply the cup value by 8 to get fluid ounce.
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About this conversion
This page converts fluid ounce (fl oz) to cup (cup) within the cooking converter.
A US fluid ounce is 1/128 of a US gallon, equal to about 29.57 milliliters. A US customary cup equals 236.5882365 milliliters, widely used in American recipes.
The formula is cup = fl oz × 0.125, based on each unit's fixed relationship to the cooking converter's reference units.
Results are consistent because the conversion relies on a fixed numerical ratio rather than an estimate.
Use the calculator above for instant results, or the table below for common fluid ounce values already converted to cup.