US Cups to US Teaspoons
Convert us cups to us teaspoons instantly. 1 cup = 48 tsp. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert us cups to us teaspoons
To convert us cups to us teaspoons, multiply by 48. 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.
tsp = cup × 48
US Cups to US Teaspoons conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| US Cups | US Teaspoons |
|---|---|
| 1 cup | 48 tsp |
| 2 cup | 96 tsp |
| 3 cup | 144 tsp |
| 5 cup | 240 tsp |
| 10 cup | 480 tsp |
| 20 cup | 960 tsp |
| 25 cup | 1,200 tsp |
| 50 cup | 2,400 tsp |
| 100 cup | 4,800 tsp |
| 500 cup | 24,000 tsp |
| 1,000 cup | 48,000 tsp |
What is a us cup?
8 US fluid ounces. The standard American recipe measure.
What is a us teaspoon?
About 4.93 mL. The smallest standard US kitchen measure.
The formula
tsp = cup × 48
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 Cups to US Teaspoons
- Type the number of us cups you want to convert.
- Read the result in us teaspoons 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 teaspoons to us cups page.
US Cups to US Teaspoons — frequently asked questions
How many us teaspoons are in a us cup?
One us cup equals 48 tsp. tsp = cup × 48
What is the formula to convert us cups to us teaspoons?
The formula is tsp = cup × 48. 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 teaspoons back to us cups?
Divide instead of multiplying: one us teaspoon is 0.0208333333 cup. 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 cups to us teaspoons 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