Teaspoons to Cups
Type a value in either box to convert between teaspoons and cups. The factor is 0.0208333.
| Teaspoons | 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 |
| 25 tsp | 0.520833 cup |
| 50 tsp | 1.041667 cup |
| 100 tsp | 2.083333 cup |
How to use
- Enter a value in the Teaspoons field.
- The Cups figure appears immediately — no button to press.
- Typing in the Cups field converts back to Teaspoons the same way.
- Use the reference table for the values that come up most often.
Teaspoons to Cups formula
To convert teaspoons to cups, multiply by 0.0208333333.
cup = tsp × 0.0208333333
Put another way, one teaspoon is exactly 1/48 of a cup.
Why this factor: the teaspoon and the cup are both defined against the liter, so dividing one definition by the other gives 0.0208333333 directly. Both definitions are set out in full below.
To go the other way, divide by 0.0208333333 — or use the Cups to Teaspoons converter, which is the same calculation reversed.
Worked example
Take 8 tsp and multiply by the factor 0.0208333333: the result is 0.166667 cup.
8 tsp × 0.0208333333 = 0.166667 cup
The converter above does this for any value you type, in either direction.
What is a teaspoon?
A US teaspoon is the smallest common cooking measure, one third of a tablespoon.
Definition: Exactly one sixth of a US fluid ounce, so about 4.9289 milliliters — conventionally rounded to 5 mL.
Where it is used: Recipes, spice and leavening quantities, and liquid medicine doses.
What is a cup?
A US customary cup is the standard cooking volume measure in American recipes.
Definition: Exactly one sixteenth of a US liquid gallon, so exactly 236.5882365 milliliters.
Where it is used: American recipes and baking, where dry and liquid ingredients alike are measured by cup.
Worth knowing: Nutrition labels use the US *legal* cup of exactly 240 mL, and a metric cup is 250 mL — three slightly different cups are in circulation.
Teaspoons vs Cups
The teaspoon and the cup belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many cups are in a teaspoon?
One teaspoon equals 0.0208333333 cups.
What is the formula to convert teaspoons to cups?
Multiply the number of teaspoons by 0.0208333333. To reverse it, divide by 0.0208333333 instead.
How do I convert cups back to teaspoons?
Divide by 0.0208333333, which is the same as multiplying by 48.
How many cups are in 10 teaspoons?
10 tsp works out to 0.208333 cup.
Is there anything to watch out for with cups?
Nutrition labels use the US *legal* cup of exactly 240 mL, and a metric cup is 250 mL — three slightly different cups are in circulation.
How is the teaspoon defined?
Exactly one sixth of a US fluid ounce, so about 4.9289 milliliters — conventionally rounded to 5 mL.