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Cups to Teaspoons Converter

Quickly convert cups to teaspoons when a recipe calls for small amounts. Shows tsp totals and common fraction shortcuts for baking and drinks.

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Last updated: April 16, 2026

Created by: Eon Tools Dev Team

Reviewed by: Radu Vasile


What this does

So a recipe calls for part of a cup of something, and you would rather measure it out in teaspoons, maybe for a spice, a flavouring, or a small batch. This converter turns cups into teaspoons for you. It can also give tablespoons, and it lets you choose between US and Imperial spoons, because they are not the same size.

How to use it

  1. Enter the number of cups.
  2. Pick your cup type, US Legal (240 ml) or Imperial (284 ml).
  3. Choose the spoon you want, US or Imperial teaspoons, or tablespoons, then press Calculate.

For the everyday answer, leave it on US teaspoons.

How the conversion works

The handy rule to remember is that a US cup holds 48 teaspoons, because there are 16 tablespoons in a cup and 3 teaspoons in each tablespoon. So as a quick guide:

teaspoons = cups × 48

The tool is a little more exact. It turns your cup into millilitres first, then divides by the size of one teaspoon:

teaspoons = (cups × cup size in ml) ÷ millilitres per teaspoon

So with the 240 ml US Legal cup you will see about 48.7 teaspoons rather than a flat 48. The round 48 comes from the slightly smaller US customary cup of about 237 ml. Neither is wrong, they just begin from a different cup.

Good to know

Teaspoons are where small mistakes do the most damage, since a recipe rarely needs many of them and being off by one matters. Keep the anchors close: 3 teaspoons to a tablespoon, 48 to a cup.

Imperial teaspoons are a bit bigger than US ones, so switching to Imperial lowers the count slightly for the same cup. Most modern recipes mean US teaspoons unless they say otherwise.

Questions people ask

How many teaspoons are in a cup?

Forty eight US teaspoons. So half a cup is 24 teaspoons and a quarter cup is 12.

Why does the tool show about 48.7, not 48?

Because it converts through millilitres using the cup size you pick. The 240 ml legal cup lands just over 48, while the round 48 comes from the smaller customary cup.

How many teaspoons make a tablespoon?

Three. Lock that one in, it is the conversion people most often get wrong.

References

  1. U.S. Department of Agriculture, Food Buying Guide. Guide to Volume Equivalents for Liquids. https://foodbuyingguide.fns.usda.gov/Content/TablesFBG/Table12_FBG_A_Guide_to_Volume_Equivalents_for_Liquids.pdf
  2. U.S. Food and Drug Administration. Guidance for Industry: Guidelines for Determining Metric Equivalents of Household Measures. https://www.fda.gov/regulatory-information/search-fda-guidance-documents/guidance-industry-guidelines-determining-metric-equivalents-household-measures

Radu Vasile

Radu Vasile is a gluten-free food creator from Romania who runs The GF Recipes and has built a global community of more than 100,000 followers across his blog, app, and social platforms. With over six years of experience creating food content, he brings practical knowledge of recipe, nutrition, and food focused utility needs. At Eon Tools, he reviews food tools.

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