---
title: "Teaspoons to US cups — tsp to cup converter"
description: "1 teaspoon = 0.020833 US cups. Convert teaspoons to US cups with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/teaspoons-to-cups/
site: "At One Place"
---

# Teaspoons to US cups

**1 teaspoon in US cups: 1 tsp = 0.020833 cup**

cup = tsp × 1/48

To convert teaspoons to US cups, multiply by 0.02083333333. The table below gives the values people look up most often, and the converter works for any number.

## Teaspoons to US cups table

*Common teaspoon values converted to US cups.*

| Teaspoons | US cups |
| --- | --- |
| 1 tsp | 0.020833 |
| 2 tsp | 0.041667 |
| 3 tsp | 0.0625 |
| 4 tsp | 0.083333 |
| 5 tsp | 0.10417 |
| 10 tsp | 0.20833 |
| 15 tsp | 0.3125 |
| 20 tsp | 0.41667 |
| 25 tsp | 0.52083 |
| 30 tsp | 0.625 |
| 40 tsp | 0.83333 |
| 50 tsp | 1.041667 |
| 75 tsp | 1.5625 |
| 100 tsp | 2.083333 |
| 250 tsp | 5.208333 |
| 500 tsp | 10.41667 |
| 1,000 tsp | 20.83333 |

## How the conversion works

The relationship is cup = tsp × 1/48. Both units measure volume, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two.

> US cup: US legal cup is 240 mL; the customary cup used here is 236.588 mL.

## Common questions

### How many US cups are in one teaspoon?

One teaspoon equals 0.020833 US cups. cup = tsp × 1/48.

### How do you convert teaspoons to US cups?

Use cup = tsp × 1/48. So 10 tsp is 0.20833 cup.

### How many teaspoons are in one US cup?

One US cup equals 48 teaspoons, which is the reverse of the conversion above.

### Is there more than one kind of US cup?

US legal cup is 240 mL; the customary cup used here is 236.588 mL.

## Related pages

- [US cups to Teaspoons](https://atoneplace.net/convert/cups-to-teaspoons/)
- [Teaspoons to Liters](https://atoneplace.net/convert/teaspoons-to-liters/)
- [Teaspoons to Milliliters](https://atoneplace.net/convert/teaspoons-to-ml/)
- [Teaspoons to Cubic meters](https://atoneplace.net/convert/teaspoons-to-cubic-meters/)
- [Teaspoons to US gallons](https://atoneplace.net/convert/teaspoons-to-gallons/)
- [Teaspoons to US quarts](https://atoneplace.net/convert/teaspoons-to-quarts/)
- [Teaspoons to US pints](https://atoneplace.net/convert/teaspoons-to-pints/)
- [Teaspoons to US fluid ounces](https://atoneplace.net/convert/teaspoons-to-fl-oz/)
- [Teaspoons to Tablespoons](https://atoneplace.net/convert/teaspoons-to-tablespoons/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)