1US cup
Fluid Ounces to Cups
Eight in a US cup. Metric and UK cups are a little bigger.
Tip: you can type “8 oz flour” or “500 ml to oz”.
8 US fluid ounces =
Try:
about ⅔2/3 of a 12 fl oz soda can
Reading this as US fluid ounces — the most common; check your label.
Did you mean:
For:
Details
Weighs about 237 g as
All units
- mL
- 237
- L
- 0.237
- US cup
- 1
- US tbsp
- 16
- US tsp
- 48
- US pint
- 0.5
- US qt
- 0.25
- US gal
- 0.0625
How we got this
8 US fluid ounces × 29.5735295625 mL/fl oz = 236.588237 mL
236.588237 mL ÷ 236.5882365 mL/cup = 1 US cup
1 US fl oz = 29.5735295625 mL (NIST). 1 UK fl oz = 28.4130625 mL (UK Weights and Measures Act 1985).
Density used: water, 1 g/mL. By definition close to 1 g/mL at room temperature. Source: NIST.
Also useful:
A US cup is 8 US fluid ounces, 236.59 mL, so divide fluid ounces by 8. 16 fl oz is 2 cups, 12 fl oz is 1.5 cups and 4 fl oz is half a cup. US nutrition labels round the cup to 240 mL as a household measure, but a measuring cup is 236.59 mL.
Outside the US the cup is not 8 oz. A metric cup is 250 mL, which is 8.45 US fl oz or 8.80 UK fl oz. A UK fluid ounce is smaller than a US one, so 8 UK fl oz is 227.30 mL, a little under a metric cup. If the recipe says plain oz for a dry ingredient it means weight, and the cup answer depends on the ingredient.
Quick answers
- 8 US fl oz
- 1 US cup
- 8 UK fl oz
- 0.91 UK cups
Formula
US cups = US fl oz ÷ 8US fl oz = US cups × 8UK cups = UK fl oz ÷ 8.79877UK fl oz = UK cups × 8.79877
Conversion table
| Amount | US fl oz to US cups | UK fl oz to UK cups |
|---|---|---|
| 1 | 0.13 | 0.11 |
| 2 | 0.25 | 0.23 |
| 4 | 0.5 | 0.45 |
| 6 | 0.75 | 0.68 |
| 8 | 1 | 0.91 |
| 10 | 1.25 | 1.14 |
| 12 | 1.5 | 1.36 |
| 16 | 2 | 1.82 |
| 20 | 2.5 | 2.27 |
| 24 | 3 | 2.73 |
| 32 | 4 | 3.64 |
| 48 | 6 | 5.46 |
| 64 | 8 | 7.27 |
| 128 | 16 | 14.55 |
Which ounce?
| Ounce | Exactly | Used for |
|---|---|---|
| Ounce (oz) | 28.349523125 g | Food, mail, kitchen scales, the default meaning of a bare “oz”. |
| US fluid ounce (US fl oz) | 29.5735295625 mL | US labels, bottles, cans. 16 of them make a US pint. |
| UK fluid ounce (UK fl oz) | 28.4130625 mL | UK recipes, older imperial labels. 20 of them make a UK pint. |
| Troy ounce (oz t) | 31.1034768 g | Gold, silver, platinum. About 10% heavier than the ounce on your kitchen scale. |
Common amounts
- 8 oz cup 237 mL
- 12 oz can 355 mL
- 16.9 oz bottle 500 mL
- 20 oz bottle 591 mL
- 3.4 oz TSA 100 mL
- 1.7 oz perfume 50 mL
- 8 oz steak 227 g
- 1 oz gold 31.1 g
Questions
How many oz is a cup?
A US cup is 8 US fl oz. A 250 mL metric cup is 8.45 US fl oz or 8.80 UK fl oz.
How many fl oz are in a liter?
33.81 US fl oz or 35.20 UK fl oz. A liter is 4.23 US cups.
How many fl oz are in a gallon?
A US gallon is 128 US fl oz. A UK gallon is 160 UK fl oz, 4.55 liters.
How many cups are in a gallon?
16 US cups. A US pint is 2 cups and a quart is 4 cups.
Is 8 oz of flour one cup?
No. 8 fl oz is one cup of liquid, but 8 oz of flour is a weight and fills about 1.8 US cups. The oz to cups page has the weight table.