There are online calculators to find the volume of a pipe on nCalculators.com and HandyMath.com, as of 2015. Both websites display the volume of a pipe in different units of measurement.
The pipe volume calculator is found on nCalculators.com by clicking "Math Calculators," "Area & Volume Calculators" and "Pipe Volume Calculator." The visitor is prompted to enter the inside radius and height of the pipe, select the unit and click "Calculate." The result is displayed below the Calculate icon.
A pipe volume calculator is found on HandyMath.com by clicking "Calculators" on the home page and "Calculation of Volume of the Shell of a Tube or Pipe" on the next page. The visitor is prompted to enter inside diameter and height of the pipe and click "Calculate."