How many US cups are in 1 teaspoon?

1 teaspoon equals 0.0208333 cup.

How do I convert US cups back to teaspoons?

Use the reverse converter: 1 US cup equals 48 tsp.

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert teaspoons to US cups, multiply the value by 0.0208333333.

cup = tsp × 0.0208333333

15 tsp × 0.0208333333 = 0.3125 cup

Note: "cup" here means the US cup (about 236.6 mL). Metric cups (250 mL), imperial cups and US/UK fluid ounces are listed as separate units.

Teaspoon (tsp): A US kitchen measure equal to about 4.929 millilitres, used in recipes.
US Cup (cup): The US customary cup (about 236.588 mL), the default "cup" in American recipes.

How do I convert teaspoons to US cups?: To convert teaspoons to US cups, multiply the value by 0.0208333333.
How many US cups are in 1 teaspoon?: 1 teaspoon equals 0.0208333 cup.
How many US cups are in 10 teaspoons?: 10 tsp equals 0.208333 cup.
How do I convert US cups back to teaspoons?: Use the reverse converter: 1 US cup equals 48 tsp.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.