How it's calculated
cups = fl oz ÷ c (reverse: fl oz = cups × c)
fl oz = fluid ounces, c = fluid ounces the chosen cup holds (US customary = 8, imperial = 10, metric 250 mL ≈ 8.454).
Common values
| Fluid ounces (US) | Cups (US) |
|---|---|
| 4 | 0.5 |
| 8 | 1 |
| 16 | 2 |
| 32 | 4 |
Common questions
How many ounces are in a US cup?
Exactly 8 US fluid ounces, so 16 oz is 2 cups and 4 oz is half a cup.
Do all cups equal 8 ounces?
No. The US customary cup is 8 fl oz, but a metric cup is 250 mL and a Japanese cup is 200 mL, so match the standard to the recipe.