Home & DIY Calculator
Pick a material, enter your room or slab dimensions, and get an exact quantity plus a shopping list — gallons, tiles, bags, sheets, or posts. Every calculation uses standard US reference values (350 sq ft per gallon of paint, 32 sq ft per 4×8 drywall sheet, 8 ft fence-post spacing) and adds a 10% waste allowance. No sign-up, no upload — results appear instantly in your browser.
Assumes 8-ft ceilings, 1 door, 1 window, 2 coats — adjust to match your room.
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