paulr13 wrote:I would like to find the capacity of a barrel 19inches round and 32inches tall
This sounds like homework?
The formula for the volume of a cylinder is: PI * Radius squared * length
Since we used inches, the answer is in in^3 (cubic inches), but I'll assume you want the answer in gallons (US). There are 231 in^3 in 1 gallon (US), so cubic inches / 231 cu. in./gal = gallons (US).