ConvBolt — Unit ConverterUS cups to Teaspoons Converter
Converting US cups to teaspoons is a multiplication by a fixed factor: 1 cup = 48 tsp. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.
Because one us cup works out to 48 tsp, the teaspoon is the noticeably larger unit of the two: a figure given in teaspoon always carries a larger number than the same measurement in us cup. A chart drawn in cup can hide that, so check which label the axis uses before you compare two readings.
When a container size is certified in teaspoons but you are dosing in US cups, it pays to convert from the certified figure rather than from a rounded label.
The conversion factor used here is 48 tsp per us cup (0 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 cup a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 0.02083333 cup per tsp, the exact reciprocal, so a round trip through both pages returns your original number.
US cups to Teaspoons formula
Use this formula to convert any us cup value to teaspoons:
Worked example: 100 cup × 48 = 4800 tsp.
US cups to Teaspoons conversion table
| US cups (cup) | Teaspoons (tsp) |
|---|---|
| 0.5 cup | 24 tsp |
| 1 cup | 48 tsp |
| 2 cup | 96 tsp |
| 5 cup | 240 tsp |
| 10 cup | 480 tsp |
| 20 cup | 960 tsp |
| 50 cup | 2400 tsp |
| 100 cup | 4800 tsp |
| 500 cup | 24000 tsp |
| 1000 cup | 48000 tsp |
How to convert US cups to teaspoons
Multiply the us cup value by 48 to get the equivalent in teaspoons. 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 Teaspoons to US cups converter instead of dividing by hand; both pages use the same source factors. For every other cup conversion in one place, see the cup conversion hub.
Frequently asked questions
How many teaspoons are in 1 us cup?
1 us cup = 48 tsp.
What is 100 US cups in teaspoons?
100 cup = 4800 tsp.
Is converting US cups to teaspoons the same as teaspoons to US cups?
No — the direction changes the multiplier. The reverse conversion (1 tsp = 0.02083333 cup) is on the Teaspoons to US cups page.
Related conversions
Try the ConvBolt Unit Converter for any other volume unit, browse the Volume conversions, or read our conversion guides.