Enter the shape you want to find the volume of. Right now you can only do a cube, sphere, cylinder, rectangular prism, and triangular prism. Sequel to this, Perimeter Calculator: http://scratch.mit.edu/projects/35981972/ Other sequel to this, Area Calculator: https://scratch.mit.edu/projects/35975832/
If you want a shape in here, post it in the comments along with the formula. I also could have done more, but I thought these were probably the most popular.