Convert from cubic inch to drum [metric, petroleum]

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 (drum [metric, petroleum])
The drum [metric, petroleum] is a unit of volume sometimes used in the oil trade. In the metric world, drums of 200 liters, 205 liters, and 208 liters are in use as substitutes for the traditional size.