Yes. All 50+ calculators are completely free. You do not need an account, a card, or a trial to use any of them, and there is no usage limit.
What types of calculators are available?
There are calculators for paint, flooring, drywall, concrete (slabs, footings, columns, and stairs), decks, roofing, tile, fencing, gravel, mulch, lumber, insulation, stairs, crown molding, wallpaper, gutters, brick, trim, cabinet hardware, energy savings, blinds, solar, and residential electrical load.
How accurate are the material estimates?
The calculators use standard industry formulas and build in a waste factor where it applies, so the numbers are a solid planning estimate rather than a substitute for measuring. Real projects vary with site conditions, material dimensions, and local code, so buy a little more than the number you get and confirm structural work against your local building department.
Can I save my calculations?
Each calculator keeps your last inputs in your browser's local storage, so your numbers are still there when you come back on the same device. To save calculations to a project, share them across devices, and turn them into a full materials list and task plan, DIYProject.ai Pro is $7.99/mo or $49.99/yr with a 7-day free trial on the annual plan.