ConvBolt — Unit ConverterTeaspoons to US cups Converter
Converting teaspoons to US cups is a multiplication by a fixed factor: 1 tsp = 0.02083333 cup. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.
Because one teaspoon works out to 0.02083333 cup, the us cup is the far smaller unit of the two: a figure given in us cup always carries a smaller number than the same measurement in teaspoon. A chart drawn in tsp can hide that, so check which label the axis uses before you compare two readings.
When a container size is certified in US cups but you are dosing in teaspoons, it pays to convert from the certified figure rather than from a rounded label.
The conversion factor used here is 0.02083333 cup per teaspoon (8 significant digits as shown). Kept to seven figures it covers professional measurement; if you round it to two or three decimals for a spreadsheet, the error scales with the input — at a value of 1,000 tsp a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 48 tsp per cup, the exact reciprocal, so a round trip through both pages returns your original number.
Teaspoons to US cups formula
Use this formula to convert any teaspoon value to US cups:
Worked example: 100 tsp × 0.02083333 = 2.083333 cup.
Teaspoons to US cups conversion table
| Teaspoons (tsp) | US cups (cup) |
|---|---|
| 0.5 tsp | 0.01041667 cup |
| 1 tsp | 0.02083333 cup |
| 2 tsp | 0.04166667 cup |
| 5 tsp | 0.1041667 cup |
| 10 tsp | 0.2083333 cup |
| 20 tsp | 0.4166667 cup |
| 50 tsp | 1.041667 cup |
| 100 tsp | 2.083333 cup |
| 500 tsp | 10.41667 cup |
| 1000 tsp | 20.83333 cup |
How to convert teaspoons to US cups
Multiply the teaspoon value by 0.02083333 to get the equivalent in US cups. This single factor works for every value in the table above and for anything else you need — there is no per-value adjustment, which is why a conversion table and a calculator always agree.
If you need the opposite direction, use the US cups to Teaspoons converter instead of dividing by hand; both pages use the same source factors. For every other tsp conversion in one place, see the tsp conversion hub.
Frequently asked questions
How many US cups are in 1 teaspoon?
1 teaspoon = 0.02083333 cup.
What is 100 teaspoons in US cups?
100 tsp = 2.083333 cup.
Is converting teaspoons to US cups the same as US cups to teaspoons?
No — the direction changes the multiplier. The reverse conversion (1 cup = 48 tsp) is on the US cups to Teaspoons page.
Related conversions
Try the ConvBolt Unit Converter for any other volume unit, browse the Volume conversions, or read our conversion guides.