Teaspoons to Cups Converter

What this does

So you find yourself counting out a lot of teaspoons and want to know what that is in cups. This converter turns teaspoons into cups. Enter the teaspoons, pick your spoon and cup types, and it works out the cups. It takes tablespoons too, if that is easier.

How to use it

1. Enter the amount.
2. Pick the spoon type, US or Imperial teaspoons, or tablespoons.
3. Pick the cup type, US Legal or Imperial, then press Calculate.

No ingredient needed, since teaspoons and cups both measure volume.

How the conversion works

The tool turns your teaspoons into millilitres, then divides by the size of a cup:

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

A US teaspoon is about 4.93 millilitres, so 24 teaspoons comes to roughly half a cup, and 48 teaspoons to about a full cup.

Good to know

The standard rule is that 48 teaspoons make a cup, which holds against the US customary cup of about 237 millilitres. Measured against the 240 millilitre US Legal cup this tool uses, 48 teaspoons come to about 0.99 of a cup. The gap is small, and it explains why the answer is not a perfectly round number.

It also helps to remember that 3 teaspoons make a tablespoon, and 16 tablespoons make a cup, which is where the 48 comes from.

Questions people ask

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