Convert from cubic inch to Teaspoon [UK]

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 [UK])
The teaspoon is a unit of volume used in food recipes. In Britain, a traditional teaspoonful in the kitchen was equal to 1/8 Imperial fluid ounce or approximately 3.55 milliliters, but the medical teaspoonful was usually 5 milliliters.