US Teaspoons to US Cups
Convert us teaspoons to us cups instantly. 1 tsp = 0.0208333333 cup. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert us teaspoons to us cups
To convert us teaspoons to us cups, divide by 48 (multiply by 0.0208333333). The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
cup = tsp × 0.0208333333
US Teaspoons to US Cups conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| US Teaspoons | US Cups |
|---|---|
| 1 tsp | 0.020833 cup |
| 2 tsp | 0.041667 cup |
| 3 tsp | 0.0625 cup |
| 5 tsp | 0.104167 cup |
| 10 tsp | 0.208333 cup |
| 20 tsp | 0.416667 cup |
| 25 tsp | 0.520833 cup |
| 50 tsp | 1.041667 cup |
| 100 tsp | 2.083333 cup |
| 500 tsp | 10.416667 cup |
| 1,000 tsp | 20.833333 cup |
What is a us teaspoon?
About 4.93 mL. The smallest standard US kitchen measure.
What is a us cup?
8 US fluid ounces. The standard American recipe measure.
The formula
cup = tsp × 0.0208333333
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the US Teaspoons to US Cups
- Type the number of us teaspoons you want to convert.
- Read the result in us cups straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked us cups to us teaspoons page.
US Teaspoons to US Cups — frequently asked questions
How many us cups are in a us teaspoon?
One us teaspoon equals 0.0208333333 cup. cup = tsp × 0.0208333333
What is the formula to convert us teaspoons to us cups?
The formula is cup = tsp × 0.0208333333. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert us cups back to us teaspoons?
Divide instead of multiplying: one us cup is 48 tsp. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this us teaspoons to us cups free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error