US Fluid Ounces to US Cups Converter
One US Fluid Ounce equals 0.125 US Cups (1 fl-oz = 0.125 cup). Multiply a US Fluid Ounce value by 0.125 to get the equivalent in US Cups. Enter a value above to calculate the result. You can also use the formula 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 Cups.
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 Ounces × 0.125 = 1.25 US Cups.
- 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 Cups (1 fl-oz = 0.125 cup). US Fluid Ounce is used in US beverage can and bottle sizes and in cosmetics labeling in the US. US Cup is used in 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
15US Fluid Ounces equals1.875US Cups.
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 Cups.
What is the formula for US Fluid Ounce to US Cup?
The formula is cup = fl-oz × 0.125.
How many US Cups are in 1 US Fluid Ounce?
1 US Fluid Ounce equals 0.125 US Cups.
Can I convert US Cup back to US Fluid Ounce?
Yes. 1 US Cup equals 8 US Fluid Ounces, 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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