# 4 teaspoons to cups

Converts teaspoons (tsp) to cups (cup) and back, with the exact unit definitions.

- Page: https://www.acalculator.org/convert/4-teaspoons-to-cups
- JSON spec: https://www.acalculator.org/convert/4-teaspoons-to-cups.json
- Version: 8333d4157025

## Default answer

Example with the default inputs (Teaspoons (tsp) 4): 4 tsp = 0.083333 cups.

## Inputs

| Key | Label | Description |
| --- | --- | --- |
| value | Teaspoons (tsp) | The amount in teaspoons to convert. |
| result | Cups (cup) | The same amount in cups. |

## Outputs

| Key | Label | Description |
| --- | --- | --- |
| value | Teaspoons (tsp) | The amount in teaspoons to convert. |
| result | Cups (cup) | The amount in cups. |

## Method

cup = tsp × 0.0208333333333 (the same as tsp ÷ 48)

## Assumptions

- 1 teaspoon = 0.0208333333333 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; an answer of 1 billion or more shows at most 15 significant digits.

## Worked examples

1. value = 1 gives result = 0.020833. Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8.
2. value = 48 gives result = 1. Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8.
3. result = 1 gives value = 48. Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8.

## FAQ

### What is 4 teaspoons in cups?

4 tsp is 0.083333 cups. The formula is cup = tsp × 0.0208333333333 (the same as tsp ÷ 48).

### How many cups are in a teaspoon?

1 teaspoon is 0.020833 cups, from the exact unit definitions (NIST SP 811).

### How do I convert teaspoons to cups?

Divide by 48: cup = tsp × 0.0208333333333 (the same as tsp ÷ 48). For example, 4 tsp ÷ 48 = 0.083333 cups.

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

Multiply by 48, or type the cups into the second box and the converter works it out. 1 cup is 48 teaspoons.

## 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