# What is 12 oz to cups?

Converts fluid ounces (fl oz) to cups (cup) and back, with the exact unit definitions.

- Page: https://www.acalculator.org/convert/12-oz-to-cups
- JSON spec: https://www.acalculator.org/convert/12-oz-to-cups.json
- Version: 011a29f15ddb

## Default answer

Example with the default inputs (Fluid ounces (fl oz) 12): 12 fl oz = 1.5 cup.

## Inputs

| Key | Label | Description |
| --- | --- | --- |
| value | Fluid ounces (fl oz) | The amount in fluid ounces to convert. |
| result | Cups (cup) | The same amount in cups. |

## Outputs

| Key | Label | Description |
| --- | --- | --- |
| value | Fluid ounces (fl oz) | The amount in fluid ounces to convert. |
| result | Cups (cup) | The amount in cups. |

## Method

cup = fl oz × 0.125 (the same as fl oz ÷ 8)

## Assumptions

- 1 fluid ounce = 0.125 cups, from the exact definitions in NIST SP 811.
- Cups, ounces, tablespoons, pints, quarts, and gallons are US customary units: 1 US cup is 8 US fluid ounces.
- Ounces here are US fluid ounces, a volume. An ounce of weight (1/16 lb) is a different unit.
- The answer shows at most 6 decimal places; the calculation keeps full precision.

## Worked examples

1. value = 1 gives result = 0.125. Source: exact unit definitions in NIST SP 811 (2008), Appendix B.8.
2. value = 8 gives result = 1. Source: exact unit definitions in NIST SP 811 (2008), Appendix B.8.
3. result = 1 gives value = 8. Source: exact unit definitions in NIST SP 811 (2008), Appendix B.8.

## FAQ

### What is 12 oz in cups?

12 fl oz is 1.5 cup. The formula is cup = fl oz × 0.125 (the same as fl oz ÷ 8).

### How many cups are in a fluid ounce?

1 fluid ounce is 0.125 cups, from the exact unit definitions (NIST SP 811).

### How do I convert oz to cups?

Multiply by 0.125: cup = fl oz × 0.125 (the same as fl oz ÷ 8). For example, 12 fl oz × 0.125 = 1.5 cup.

### How do I convert cups back to oz?

Multiply by 8, or type the cups into the second box and the converter works it out. 1 cup is 8 fluid ounces.

### Is an ounce here a weight or a volume?

A volume: the US fluid ounce, 1/8 of a US cup (29.57 mL). An ounce of weight (1/16 lb, 28.35 g) only matches a fluid ounce for water and liquids like it.

## Sources

- NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B.8. https://www.nist.gov/pml/special-publication-811