How to convert US fluid ounces to US cups
In US recipes, 1 cup = 8 US fluid ounces = 236.6 ml, so divide fluid ounces by 8 to get cups: 12 fl oz ÷ 8 = 1.5 cups. A UK fluid ounce is slightly smaller (28.4 ml compared with 29.6 ml), and a UK pint is 20 UK fl oz, not 16. Choose "UK fluid ounces" above if your recipe is British.
Fluid ounces measure volume, not weight. A cup of flour weighs about 125 g, while a cup of sugar weighs about 200 g, so convert dry ingredients by weight with the grams to pounds converter, or use kitchen scales.
US fluid ounces to US cups table
- 1 US fluid ounces = 0.125 US cups
- 2 US fluid ounces = 0.25 US cups
- 4 US fluid ounces = 0.5 US cups
- 6 US fluid ounces = 0.75 US cups
- 8 US fluid ounces = 1 US cups
- 12 US fluid ounces = 1.5 US cups
- 16 US fluid ounces = 2 US cups
- 24 US fluid ounces = 3 US cups
- 32 US fluid ounces = 4 US cups
- 64 US fluid ounces = 8 US cups
Frequently asked questions
How many ounces in a cup?
8 US fluid ounces make 1 US cup (about 237 ml).
How do I convert US cups back to US fluid ounces?
Press "Swap units" and type your value. The same factor is applied in reverse.
Is the result exact?
Yes. Results use the exact defined factors and show up to 8 decimal places.
How to use the Ounces to Cups Converter
- Enter the value you want to convert.
- The result appears instantly as you type.
- Use the quick reference table below for common values.
- Copy the answer or reverse the conversion.
Why use this Ounces to Cups Converter
100% in your browser
Nothing you enter is uploaded or stored.
Instant results
Updates as you type, no waiting.
Mobile friendly
Works on phones, tablets and desktops.
Light & dark mode
Follows your mfaysal.com theme.
Free, no account
No sign-up, no limits, no watermark.
Explained
Formulas, tables and sources on the page.
Ounces to Cups Converter: chart and reference data
Source: 1 US cup = 8 US fl oz; UK fl oz = 28.4130625 ml, US fl oz = 29.5735 ml
UK recipes mostly use grams and millilitres. American recipes use cups, and a US fluid ounce (29.57 ml) is slightly bigger than a UK fluid ounce (28.41 ml).
| fl oz | cups |
|---|---|
| 0 | 0 |
| 4 | 0.5 |
| 8 | 1 |
| 12 | 1.5 |
| 16 | 2 |
| 20 | 2.5 |
| 24 | 3 |
| 28 | 3.5 |
| 32 | 4 |
Ounces to Cups Converter compared with the alternatives
| Method | Speed | Accuracy | Best for |
|---|---|---|---|
| This converter | Instant | Exact ratio | Everyday and precise work |
| Mental rule of thumb | Fast | Approximate | Rough estimates |
| Printed conversion chart | Slow | Limited to listed values | Offline reference |
Who uses it in the UK
- Cooking with US or old British recipes
- DIY and home improvement
- Travel, sport and fitness
- School science and maths homework
More questions
What is the formula to convert fl oz to cups?
US cups = US fl oz ÷ 8. 1 US cup = 8 US fl oz; UK fl oz = 28.4130625 ml, US fl oz = 29.5735 ml.
How accurate is this converter?
It uses the exact defined ratio and JavaScript double-precision numbers, so results are accurate to well beyond the decimal places shown. Rounding only happens for display.
Can I convert cups back to fl oz?
Yes. Reverse the formula, or type into the other box if the tool shows both directions.
Does it work offline?
Yes. Once the page has loaded, all the maths happens in your browser, so it keeps working without a connection.
✨ New: Remove the background from any image free – private, in your browser, transparent PNG.
Related free tools
Sources
Note: This free tool runs entirely in your browser. No data is sent or stored. Results are for information only.