Before you start to calculate 1000 Barrels, you should know the conversion rate between Barrels and Cubic Inch.
The rate is 9.734032E-12 and the math equation is 1000 X 9.734032E-12 = 9.734032E-9 .
Quick conversion chart of Barrels to Cubic Inchs
1 Barrel to Cubic Inch = 9.734032E-12 Cubic Inch5 Barrel to Cubic Inch = 4.867016E-11 Cubic Inch10 Barrel to Cubic Inch = 9.734032E-11 Cubic Inch20 Barrel to Cubic Inch = 1.9468064E-10 Cubic Inch30 Barrel to Cubic Inch = 2.9202096E-10 Cubic Inch40 Barrel to Cubic Inch = 3.8936128E-10 Cubic Inch50 Barrel to Cubic Inch = 4.867016E-10 Cubic Inch75 Barrel to Cubic Inch = 7.300524E-10 Cubic Inch100 Barrel to Cubic Inch = 9.734032E-10 Cubic Inch