How many teaspoons are in a cup?

There are exactly 48 US teaspoons in 1 US customary cup. This follows from 3 teaspoons = 1 tablespoon and 16 tablespoons = 1 cup (3 × 16 = 48).

How many teaspoons are in half a cup?

Half a cup equals 24 teaspoons. A quarter cup is 12 teaspoons, and a third cup is 16 teaspoons.

Is a metric teaspoon the same as a US teaspoon?

A metric teaspoon is exactly 5 mL. A US teaspoon is approximately 4.929 mL — very close but not identical. For most cooking purposes the difference is negligible.

Why does the fraction sometimes say "approx."?

When the decimal result does not land exactly on a standard fraction (½, ⅓, ¼, ⅛, etc.), the converter picks the nearest common fraction and marks it approximate.

Can I convert decimal teaspoon values like 1.5 or 0.25?

Yes. Type any positive number including decimals and the converter handles it correctly.

How do I convert back from cups to teaspoons?

Multiply cups by 48. For example, 0.5 cups × 48 = 24 teaspoons. Use the cup-to-teaspoon tool for the reverse direction.

Teaspoons to Cups Converter

Name: Teaspoons to Cups Converter
Availability: InStock
Author: Nham Vu

Enter a number of teaspoons and instantly see the equivalent in cups with fraction display and a quick-reference table.

Enter Teaspoons

Teaspoons (tsp)

Conversion: 1 US cup = 48 teaspoons

Result

Enter a value to see the conversion.

Teaspoons to Cups — Quick Reference

1 tsp 1/48 cup

3 tsp 1/16 cup

6 tsp 1/8 cup

8 tsp 1/6 cup

12 tsp 1/4 cup

16 tsp 1/3 cup

24 tsp 1/2 cup

48 tsp 1 cup

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Summary

Enter a number of teaspoons and instantly see the equivalent in cups with fraction display and a quick-reference table.

How it works

Enter the number of teaspoons in the input field.
The converter divides your value by 48 (teaspoons per US cup).
The result updates instantly showing decimal cups and the nearest common fraction.
Use the Copy button to copy the result to your clipboard.
Scroll down to the quick-reference table for common teaspoon-to-cup values.

Use cases

Scale a recipe that lists cups when you only have a teaspoon measure.
Convert bulk spice quantities from teaspoons into cups for meal prep.
Check how many cups are in an unusual teaspoon count without mental math.
Help children learn cooking fractions with real measurements.
Verify a baking recipe when switching between teaspoon and cup measurements.
Convert small liquid volumes quickly while cooking.

Frequently Asked Questions

Last updated: 2026-07-23 · Reviewed by Nham Vu