Convert from cubic inch to Teaspoon [US]

Unit Definition (cubic inch)
The cubic inch is a traditional unit of volume in English speaking countries. One cubic inch equals 1/1728 = 5.787 037 x 10E-4 ft³, 16.3871 cm³, 16.3871 milliliters, 0.5541 U.S. fluid ounce, or 0.5767 British Imperial fluid ounce

Unit Definition (Teaspoon [US])
The teaspoon is a unit of volume used in food recipes. The U.S. teaspoon is equal to 1/3 tablespoon or 1/48 cup; this is equivalent to 1/6 fluid ounce, about 0.30 cubic inches, or approximately 4.9 milliliters.