Quilt project planner
One project, every component. Sizes flow forward: the block grid sets the sashed size, the borders set the top, and binding and backing are figured from that top. Then the planner throws away the per-calculator numbers and re-packs every piece of each fabric together, so a fabric shared by the blocks and the border is bought once, at the true total. The project saves in this browser as you work, and the share button copies a link that carries the whole project with it.
Working one component at a time instead? Each calculator has an add-to-project button that files its component here: the block yardage calculator for blocks, sashing, borders, binding, and backing. Components added on their own bring their quilt top size along, marked as an override above, until a block grid replaces it.