If you have difficulty figuring out yardage needed, use graph paper (plan one square to equal one inch) and draw the pieces needed for a block or two or maybe three (if several different colors needed). This should show you how many blocks you can get out of 1/4 or 1/3 yard (approx). Then multiply that for how ever many blocks you will need and it will give you a much closer yardage requirement. Remember to keep in mind grain lines and seam allowances. But, even if the budget is tight, add a bit extra for problems or miscalculations. Having a great stash is a good thing, but I understand trying to stay within a budget!