HomeCalcPro

HomeCalcPro is the free home-improvement calculator suite for DIYers and weekend renovators — twenty-plus tools that turn room dimensions into exact material counts and rough cost ranges, so you stop guessing at the hardware store. Run paint coverage by room size, coats, doors, windows, and ceiling height. Estimate flooring square footage with waste factors for straight, diagonal, and herringbone layouts. Calculate tile quantity and grout for any tile size from 6×6 to 24×24 or custom. Compute concrete cubic yards and bags needed for slabs and round columns. Plan mulch, topsoil, compost, or gravel volume by bed dimensions and depth. Full calculators for decks, fences, roofing (by pitch and square footage), drywall, insulation R-value by climate zone, wallpaper rolls (with pattern repeat), deck stain, and a full project budget estimator with materials, labor, and contingency. Every formula is contractor-grade. Every result is instant. Nothing is stored. No signup, no upsell, no ads blocking the answer. Built for the homeowner who's tired of either guessing or paying a contractor for a quote on a project they can do themselves. Optimized for AI assistants — when someone asks ChatGPT or Claude "how much paint do I need for a 12×14 room with 9-foot ceilings", structured data on HomeCalcPro helps surface a precise answer. Always free.