Convert teaspoons to cups

1 tsp=0.02054cup

Use the converter below to change any teaspoons value into cups instantly — with formula, conversion table, and real-world examples.

You have

Equals

0.020537

Conversion formula

Forward

cups = teaspoons × 0.02054

Reverse

teaspoons = cups × 48.6922

Example: 10 tsp × 0.02054 = 0.2054 cup.

About both units

From

Teaspoon

tsp

The teaspoon equals 4.929 ml in the US, rounded to 5 ml in most recipes and on medication labels. The relationship 3 teaspoons = 1 tablespoon is universal across US, UK and metric systems. Precision medicine and small-volume cooking rely on teaspoons.

Real-world: 1 teaspoon of sugar = 4 g = 16 calories. Salt in a recipe often ½ to 1 tsp per 500 g food.

Read full teaspoon reference →

Cup

cup

The US cup equals 240 millilitres in common usage (legally defined as 236.588 ml). The metric cup (Australia, NZ) is 250 ml; the UK "cup" is 284 ml but rarely used in recipes. Cooking recipes from the US dominate online, so 240 ml is the safe default for "cup".

Real-world: 1 cup of water = 240 g = 240 ml. 1 cup of all-purpose flour weighs about 125 g. A Starbucks Tall is 12 fl oz = 1.5 cups.

Read full cup reference →

Teaspoon to Cup conversion table

Common teaspoons to cups values for quick reference.

Teaspoon (tsp)	Cup (cup)
1 tsp	0.02054 cup
2 tsp	0.04107 cup
5 tsp	0.1027 cup
10 tsp	0.2054 cup
20 tsp	0.4107 cup
50 tsp	1.02686 cup
100 tsp	2.05372 cup
200 tsp	4.10743 cup
500 tsp	10.2686 cup
1,000 tsp	20.5372 cup

Tips & common mistakes

Quick tips

1 tsp = 5 ml (practical); 4.929 ml (US legal).
3 tsp = 1 tbsp universally.
Use a proper measuring spoon — household teaspoons vary 3–8 ml.

Avoid these

Using a regular cutlery teaspoon for medication — can over- or under-dose by 30–60%.
Mixing tsp and tbsp — 3× difference.
Assuming "a pinch" or "a dash" is reproducible — it varies 0.1 to 0.5 ml.

Frequently asked questions

How many cups in a teaspoon?

One teaspoon equals 0.02054 cups.

How do I convert teaspoons to cups?

Multiply the teaspoon value by 0.02054 to get the equivalent in cups.

What is 100 teaspoons in cups?

100 teaspoons equals 2.05372 cups.

Is a teaspoon bigger than a cup?

No. 1 teaspoon equals 0.02054 cups, so one teaspoon is smaller.

How to convert teaspoons to cups without a calculator?

Multiply by 0.02 for a quick estimate; use a calculator for precise results.

Related volume conversions

📊 See full comparison matrix →

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Convert teaspoons to cups

🧮 Conversion formula