The Film Footage Calculator takes the guesswork out of buying film stock. No matter what stock you're using 8mm, 16mm, 35mm the Film Footage Calculator will help you work out how much you need to purchase.Simply enter the type of stock you're going to use, the frames/second you intend to shoot at, the shooting ratio and the duration of your film. The Film Footage Calculator will then tell you how many feet of film stock you need to buy.