Tank Volume Calculator App is the best Android App for calculating Filled and Half-Filled Volumes Water, Oil, Gas Volumes. Tank Volume Calculator App is a simple and very fast android app for calculating the volume of tanks and gallons. The best feature of the tank capacity calculator is built-in volume convertor, like cubic meter, cubic centimeter, liter, imp. Gallon, U.S Gallon or BBL, etc. You can calculate 15 different types of tanks and Gallon. The function of Tank Calculator Volume 1.