# How do I convert cups to pints?

Converts cups (cup) to pints (pt) and back, with the exact unit definitions.

- Page: https://www.acalculator.org/convert/cups-to-pints
- JSON spec: https://www.acalculator.org/convert/cups-to-pints.json
- Version: 4e9bd495f3fe

## Default answer

Example with the default inputs (Cups (cup) 1): 1 cup = 0.5 pt.

## Inputs

| Key | Label | Description |
| --- | --- | --- |
| value | Cups (cup) | The amount in cups to convert. |
| result | Pints (pt) | The same amount in pints. |

## Outputs

| Key | Label | Description |
| --- | --- | --- |
| value | Cups (cup) | The amount in cups to convert. |
| result | Pints (pt) | The amount in pints. |

## Method

pt = cup × 0.5

## Assumptions

- 1 cup = 0.5 pints, from the exact definitions in NIST SP 811.
- Cups, ounces, tablespoons, teaspoons, pints, quarts, and gallons are US customary units: 1 US cup is 8 US fluid ounces.
- The answer shows at most 6 decimal places; the calculation keeps full precision.

## Worked examples

1. value = 1 gives result = 0.5. Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8.
2. value = 3 gives result = 1.5. Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8.
3. result = 1.5 gives value = 3. Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8.

## FAQ

### How many pints are in a cup?

1 cup is 0.5 pints, from the exact unit definitions (NIST SP 811).

### How do I convert cups to pints?

Multiply by 0.5: pt = cup × 0.5. For example, 1 cup × 0.5 = 0.5 pt.

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

Multiply by 2, or type the pints into the second box and the converter works it out. 1 pint is 2 cups.

## 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