# Sticks of butter to cups converter

Converts sticks of butter (stick) to cups (cup) and back, with the exact unit definitions.

- Page: https://www.acalculator.org/convert/sticks-of-butter-to-cups
- JSON spec: https://www.acalculator.org/convert/sticks-of-butter-to-cups.json
- Version: 680aefa4398e

## Default answer

Example with the default inputs (Sticks of butter (stick) 1): 1 stick = 0.5 cups.

## Inputs

| Key | Label | Description |
| --- | --- | --- |
| value | Sticks of butter (stick) | The amount in sticks of butter to convert. |
| result | Cups (cup) | The same amount in cups. |

## Outputs

| Key | Label | Description |
| --- | --- | --- |
| value | Sticks of butter (stick) | The amount in sticks of butter to convert. |
| result | Cups (cup) | The amount in cups. |
| amount | Amount | The amount in sticks of butter, as the fraction when it is the page's value. |

## Method

cup = stick × 0.5

## Assumptions

- 1 stick of butter = 0.5 cups, 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.

## 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 cups are in a stick of butter?

1 stick of butter is 0.5 cups, from the exact unit definitions (NIST SP 811).

### How do I convert sticks of butter to cups?

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

### How do I convert cups back to sticks of butter?

Multiply by 2, or type the cups into the second box and the converter works it out. 1 cup is 2 sticks of butter.

### How many cups is 1 stick of butter?

1/2 cup. A US stick is marked in 8 tablespoons, and 16 tablespoons make a cup.

### How much does a stick of butter weigh?

113 g, about 4 oz (1/4 lb), in USDA FoodData Central. A cup of butter is 227 g, the weight of 2 sticks.

### How many sticks of butter are in a cup?

2. Type 1 in the cups box to see it.

### What about butter sold in blocks?

Blocks are sold by weight, often 250 g, which is about 1.1 US cups (227 g a cup, USDA). Weigh them, or use the grams to cups converter with butter.

## Sources

- NIST SP 811 (2008), Guide for the Use of the International System of Units, Table 5 (SI prefixes) and Appendix B.8 (factors for units listed alphabetically), retrieved 2026-10-05. https://www.nist.gov/pml/special-publication-811
- USDA FoodData Central, SR Legacy 173410, Butter, salted: portions 1 stick = 113 g, 1 tablespoon = 14.2 g, 1 cup = 227 g, retrieved 2026-10-05. https://fdc.nal.usda.gov/food-details/173410/nutrients