US Fluid Ounce to US Cup Converter
One US Fluid Ounce equals 0.125 US Cup (1 fl-oz = 0.125 cup). Multiply a US Fluid Ounce value by 0.125 to get the equivalent in US Cup. Use the calculator above for instant results, or follow the formula, worked examples, and reference table below.
Formula
cup = fl-oz × 0.125
Multiply the US Fluid Ounce value by 0.125 to get the equivalent value in US Cup.
Example Conversions
1 US Fluid Ounce (fl-oz)
0.125 US Cup (cup)
5 US Fluid Ounce (fl-oz)
0.625 US Cup (cup)
10 US Fluid Ounce (fl-oz)
1.25 US Cup (cup)
25 US Fluid Ounce (fl-oz)
3.125 US Cup (cup)
100 US Fluid Ounce (fl-oz)
12.5 US Cup (cup)
Conversion Table
| US Fluid Ounce (fl-oz) | US Cup (cup) |
|---|---|
| 0.1 | 0.0125 |
| 0.5 | 0.0625 |
| 1 | 0.125 |
| 2 | 0.25 |
| 5 | 0.625 |
| 10 | 1.25 |
| 25 | 3.125 |
| 50 | 6.25 |
| 100 | 12.5 |
| 250 | 31.25 |
| 500 | 62.5 |
| 1000 | 125 |
How to Convert Manually
Use these steps to convert US Fluid Ounce values to US Cup without the calculator.
- Write down the value in US Fluid Ounce (fl-oz) that you want to convert.
- Multiply that value by 0.125.
- For example, 10 US Fluid Ounce × 0.125 = 1.25 US Cup.
- Label the result as US Cup (cup).
Relative Size Comparison
This chart shows the visual difference in size between exactly one US Fluid Ounce and one US Cup.
About US Fluid Ounce and US Cup
The US fluid ounce is about 29.574 milliliters, one eighth of a US cup. Beverage cans, cosmetics, and baby formula in the US are labeled in fluid ounces. The US cup is 8 US fluid ounces, about 236.6 milliliters. It is the backbone of American recipe measurement for both liquids and dry ingredients. One US Fluid Ounce equals 0.125 US Cup (1 fl-oz = 0.125 cup). US Fluid Ounce to US Cup conversion comes up most often in US beverage can and bottle sizes and in cosmetics labeling in the US, typically when figures need restating for American recipe measurements.
Precision and Rounding: US and imperial volume units share names but differ in size (an imperial gallon is about 20% larger than a US gallon), so confirm which system a figure uses before converting. Kitchen work tolerates rounding to the nearest milliliter or quarter-teaspoon; fuel, chemistry, and brewing need three or more decimal places.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15 US Fluid Ounce equals 1.875 US Cup.
15 fl-oz × 0.125 = 1.875 cup
FAQ
How do I convert US Fluid Ounce to US Cup?
Multiply the US Fluid Ounce value by 0.125 to get the equivalent value in US Cup.
What is the formula for US Fluid Ounce to US Cup?
The formula is cup = fl-oz × 0.125.
How many US Cup are in 1 US Fluid Ounce?
1 US Fluid Ounce equals 0.125 US Cup.
Can I convert US Cup back to US Fluid Ounce?
Yes. 1 US Cup equals 8 US Fluid Ounce, and the related converter can reverse the calculation.
What are common names for US Fluid Ounce and US Cup?
US Fluid Ounce is shown as fl-oz and may also be searched as fluid ounces, fl oz, us fl oz. US Cup is shown as cup and may also be searched as cups, us cups.
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