Convert US Teaspoon to US Cup
Convert us teaspoons to us cups instantly. 1 us teaspoon = 0.0208333333 us cup — use the live calculator, the exact formula, a conversion table and worked examples. Also check the US Cup to US Teaspoon converter for the reverse conversion.
Units explained
US Teaspoon
A US teaspoon is one third of a US tablespoon (4.9289 mL).
A standardized small cooking measure.
Used everywhere in US recipes and home dosing.
US cooking measure.
US Cup
A US customary cup is one sixteenth of a US gallon (236.588 mL).
Standardized for American cooking; distinct from the 240 mL US legal cup and the 250 mL metric cup.
The standard US cooking-volume unit in recipes.
US customary cooking measure.
US Teaspoon to US Cup conversion formula
The relationship between us teaspoons and us cups:
To convert us teaspoons to us cups, multiply the value in us teaspoons by 0.0208333333. To reverse, multiply us cups by 48.
How to use this converter
Type a value into the calculator. The result in us cups updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the US Cup to US Teaspoon converter for the reverse direction.
Step-by-step: convert us teaspoons to us cups
- Write down the value in us teaspoons (tsp).
- Multiply that value by the factor 0.0208333333.
- The product is the equivalent value in us cups (cup).
- To reverse, multiply the us cup value by 48.
Worked examples
Example 1 — Convert 1 tsp to cup:
1 × 0.0208333333 = 0.0208333333 cup
Example 2 — Convert 100 tsp to cup:
100 × 0.0208333333 = 2.0833333333 cup
Real-world example — Hair-width scale measurements
A 70-us teaspoon measurement (about the diameter of a human hair) is the kind of value materials engineers regularly express in adjacent micro-scale units like us cups for direct comparison across supplier datasheets.
70 tsp × 0.0208333333 = 1.4583333333 cup
Real-world example — Paper and film thicknesses
At the thickness of office paper (roughly 3 us teaspoons), converting between sub-millimeter units is routine for packaging and printing buyers comparing quotes from metric and US suppliers.
3 tsp × 0.0208333333 = 0.0625 cup
Real-world example — Plastic-film thickness alternates
A 150-us teaspoon plastic film converts cleanly to us cups — useful for packaging buyers reconciling supplier datasheets across metric and US measurement systems.
150 tsp × 0.0208333333 = 3.125 cup
US Teaspoon to US Cup conversion table
Standard reference values for converting us teaspoons to us cups:
| US Teaspoon [tsp] | US Cup [cup] |
|---|---|
| 0.01 | 0.0002083333 |
| 0.1 | 0.0020833333 |
| 1 | 0.0208333333 |
| 2 | 0.0416666667 |
| 3 | 0.0625 |
| 4 | 0.0833333333 |
| 5 | 0.1041666667 |
| 10 | 0.2083333333 |
| 20 | 0.4166666667 |
| 30 | 0.625 |
| 40 | 0.8333333333 |
| 50 | 1.0416666667 |
| 100 | 2.0833333333 |
| 500 | 10.4166666667 |
| 1000 | 20.8333333333 |
Frequently asked questions
How many us cups is 1 us teaspoon?
How do I convert us teaspoons to us cups?
How do I convert us cups back to us teaspoons?
How many us cups is 100 us teaspoons?
Popular volume unit conversions
Convert US Teaspoon to other volume units
Show all US Teaspoon conversions
Metric / SI (8 units)
US Customary (Liquid) (7 units)
Imperial (UK) (4 units)
Cubic (length-derived) (3 units)
Cooking / Culinary (3 units)
Sources & references
Conversion factor (1 tsp = 0.0208333333 cup) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.