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15 Teaspoons to Cups

15 teaspoons equals 0.3125 cups. Use the formula, worked example, and conversion table below to check the math.

15 tsp = 0.3125 cup
tsp ÷ 48 = cup
Try: 10 tsp to cup 14 tsp to cup 16 tsp to cup 20 tsp to cup
15 tsp is also
15 tsp = 0.0739 L 15 tsp = 0.0195 gal 15 tsp = 73.93 mL 15 tsp = 2.5 fl oz 15 tsp = 0.1563 pt 15 tsp = 0.0781 qt 15 tsp = 5 tbsp
tsp
0.3125 cup

Formula and Step-by-Step

tsp ÷ 48 = cup
  1. Start with 15 tsp
  2. Divide by 48: 15 ÷ 48 = 0.3125
  3. Result: 15 tsp = 0.3125 cup

Since 1 teaspoon equals 0.020833 cups, multiply any teaspoon value by 0.020833 to convert.

Other Teaspoon to Cup Values

Teaspoons (tsp) Cups (cup)
1 tsp 0.0208 cup
2 tsp 0.0417 cup
5 tsp 0.1042 cup
10 tsp 0.2083 cup
15 tsp 0.3125 cup
20 tsp 0.4167 cup
25 tsp 0.5208 cup
50 tsp 1.04 cup
75 tsp 1.56 cup
100 tsp 2.08 cup
250 tsp 5.21 cup
500 tsp 10.42 cup
1,000 tsp 20.83 cup
calculate Teaspoon to Cup Converter swap_horiz Cup to Teaspoon Converter functions Teaspoon to Cup Formula water_drop All Volume / Capacity Conversions

Frequently Asked Questions

15 teaspoons equals 0.3125 cups.
The formula is: tsp ÷ 48 = cup. See the tsp to cup formula page for worked examples.
Use the cups to teaspoons converter. The reverse formula is: cup × 48 = tsp.
The calculator uses the full-precision conversion factor for accuracy. Table values and displayed results are rounded for readability.
The conversion formula (tsp ÷ 48 = cup) is based on internationally defined standards. Displayed results are rounded for readability, while the calculator uses the full-precision factor.
person Written by Sean Day verified Reviewed by UnitCompare update Last updated Mar 28, 2026