# What is 4 cups to pints?

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

- Page: https://www.acalculator.org/convert/4-cups-to-pints
- JSON spec: https://www.acalculator.org/convert/4-cups-to-pints.json
- Version: 27ff4aa9913a

## Default answer

Example with the default inputs (Cups (cup) 4): 4 cups = 2 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.
- Exact on the typed decimals: at most 6 decimal places (6 significant digits below 0.0001), rounded half up; an answer of 1 billion or more shows at most 15 significant digits.

## 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

### What is 4 cups in pints?

4 cups is 2 pt. The formula is pt = cup × 0.5.

### 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, 4 cups × 0.5 = 2 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: Factors for Units Listed Alphabetically (bold factors are exact), retrieved 2026-10-18. https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8