Fluid Ounce to Cup
Switch between fl oz and cups for precise volume in US customary or other systems.
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Enter a value to convert.
1 to 8 fl oz vs Cups (US Customary)
Popular fl oz to Cups Chart
| fl oz | Cups (Fraction) | Cups (Decimal) |
|---|---|---|
| 1 | ⅛ | 0.125 |
| 2 | ¼ | 0.25 |
| 4 | ½ | 0.5 |
| 6 | ¾ | 0.75 |
| 8 | 1 | 1 |
| 12 | 1½ | 1.5 |
| 16 | 2 | 2 |
| 24 | 3 | 3 |
| 32 | 4 | 4 |
Conversion Formula
To go from fluid ounces to cups: cups = fl oz ÷ factor, where factor is 8 for US customary cups [web:1][web:2][web:3].
From cups to fl oz: fl oz = cups × factor. Adjust factor for cup type: US legal ≈8.1155, metric ≈8.45, UK 10, Japan ≈7.1 [web:3].
Example: 16 fl oz to cups = 16 ÷ 8 = 2 cups. Reverse: 2 cups to fl oz = 2 × 8 = 16 fl oz.
Cup Sizes Worldwide
- US Customary: 8 fl oz (236.6 ml) – standard for recipes [web:1].
- US Legal: ~8.1 fl oz (240 ml) – nutrition labels [web:3].
- Metric: ~8.45 fl oz (250 ml) – international standard.
- UK Imperial: 10 fl oz (~284 ml) – traditional pints half.
- Japan: ~7.1 fl oz (200 ml) – rice/sake measures [web:3].
Common Questions
How many fl oz in 1 cup?
8 fl oz in a US customary cup [web:1][web:2].
6 fl oz equals how many cups?
6 ÷ 8 = 0.75 cups (¾ cup) [web:3].
Convert 20 fl oz to cups?
20 ÷ 8 = 2.5 cups [web:2].
Metric cup from fl oz?
Divide by 8.45; 8 fl oz ≈ 0.946 metric cups [web:3].
3 cups to fl oz?
3 × 8 = 24 fl oz [web:1].
UK cup size?
10 fl oz per cup [web:3].
Half cup in fl oz?
0.5 × 8 = 4 fl oz [web:2].
Quarter cup fl oz?
0.25 × 8 = 2 fl oz [web:1].