This converter turns teaspoons into US cups instantly, using the exact factor 1 teaspoon = 0.02083333333 US cups. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
The smallest standard kitchen measure, 4.93 millilitres. The US legal cup used in recipes: 240 mL, or 236.6 mL by the customary definition.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
teaspoons- The amount you are converting, measured in teaspoons
0.02083333333- The exact number of US cups in one teaspoon
US cups- The converted result
How it works, step by step
- Enter the number of teaspoons you want to convert.
- The value is multiplied by 0.02083333333, the exact conversion factor.
- The result is displayed in US cups, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 teaspoons
Multiply 5 by 0.020833333. That gives 0.104167 US cups. A quick sanity check: one teaspoon is smaller than one US cup, so the number should get smaller — and it does.
Converting 72 teaspoons
72 × 0.020833333 = 1.5 US cups. Working backwards, 1.5 ÷ 0.020833333 returns 72 teaspoons, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many US cups are in one teaspoon?
Exactly 0.02083333333. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert teaspoons to US cups?
Us Cups = teaspoons × 0.02083333333. To reverse it, divide instead: teaspoons = US cups ÷ 0.02083333333, which is the same as multiplying by 48.
Is the teaspoon bigger than the US cup?
No. One teaspoon is only 0.0208333 of a US cup, so the US cup is the larger unit.
Why does my answer differ slightly from other teaspoons to cups converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a teaspoon?
The smallest standard kitchen measure, 4.93 millilitres.
What is a US cup?
The US legal cup used in recipes: 240 mL, or 236.6 mL by the customary definition.
Teaspoons to US cups reference table
| Teaspoons | Us Cups |
|---|---|
| 0.5 tsp | 0.010417 cup |
| 1 tsp | 0.020833 cup |
| 2 tsp | 0.041667 cup |
| 3 tsp | 0.0625 cup |
| 5 tsp | 0.104167 cup |
| 10 tsp | 0.208333 cup |
| 15 tsp | 0.3125 cup |
| 20 tsp | 0.416667 cup |
| 25 tsp | 0.520833 cup |
| 50 tsp | 1.0417 cup |
| 75 tsp | 1.5625 cup |
| 100 tsp | 2.0833 cup |
| 250 tsp | 5.2083 cup |
| 500 tsp | 10.4167 cup |
| 1000 tsp | 20.8333 cup |
Exact factor: 1 teaspoon = 0.02083333333 US cups. Values rounded for display.