Free Paint & Material Calculators
Measure once. Buy the right amount.
Free home improvement calculators that show the math behind every estimate-from paintable area to coats, coverage, waste, and a purchase-ready quantity.
How much paint?
Tools for the trip to the store.
Choose the material or surface you are planning. Each tool shows its formula, assumptions, recommended purchase amount, and estimated cost.
Interior paint calculator
Estimate wall and ceiling paint with door, window, coat, and coverage adjustments.
Open calculator ->TOOL 02Wall area calculator
Measure total paintable wall area without drawing a floor plan.
Open calculator ->TOOL 03Primer calculator
Plan primer separately for new drywall, repairs, and color changes.
Open calculator ->TOOL 04Ceiling paint calculator
Estimate flat or textured ceiling paint, extra allowance, and cost.
Open calculator ->TOOL 05Exterior paint calculator
Plan siding paint by house footprint, height, openings, and surface coverage.
Open calculator ->TOOL 06Tile calculator
Estimate tile count, full boxes, cutting waste, and cost from area, tile size, and grout width.
Open calculator ->TOOL 07Flooring calculator
Estimate laminate, vinyl, or hardwood cartons, cutting waste, leftover coverage, and cost.
Open calculator ->TOOL 08Caulk and sealant calculator
Estimate cartridges from joint length, width and depth, package volume, waste allowance and price.
Open calculator ->TOOL 09Fence paint and stain calculator
Estimate paint or stain for fence panels, gaps, gates, coats, coverage and cost.
Open calculator ->TOOL 10Deck stain calculator
Estimate deck stain for boards, railings, stairs, coats, coverage, waste and cost.
Open calculator ->TOOL 11Wallpaper roll calculator
Estimate wallpaper rolls from wall size, roll dimensions, pattern repeat, match type, trimming and spare strips.
Open calculator ->TOOL 12Concrete calculator
Estimate ready-mix volume, premixed bags and material cost for slabs, pads and rectangular footings.
Open calculator ->TOOL 13Spray paint calculator
Estimate aerosol cans from item count, dimensions, exposed faces, coats, can coverage, waste and price.
Open calculator ->TOOL 14Epoxy floor cost calculator
Estimate primer, epoxy base and topcoat kits plus material and labor cost from floor area and product coverage.
Open calculator ->TOOL 15Drywall and joint compound calculator
Estimate drywall sheets and joint compound from room dimensions, openings, ceiling, board size, waste and finishing rate.
Open calculator ->TOOL 16Popcorn ceiling removal cost calculator
Estimate removal, protection, repair, primer, paint, disposal and testing costs from ceiling area and difficulty.
Open calculator ->Start with a project like yours.
Compare ready-made estimates by room dimensions or actual paintable square feet, then customize every assumption.
From room dimensions to a shopping list.
Measure the project
Enter room dimensions, ceiling height, doors, and windows using familiar US or metric units.
Adjust the assumptions
Choose coats, product coverage, surface condition, and a sensible allowance for touch-ups.
Buy with confidence
Get paintable area, raw gallons, recommended purchase quantity, primer, and estimated cost.
Better measurements make better estimates.
How to measure walls for paint-without missing the awkward parts
A practical room-by-room method for openings, closets, sloped ceilings, trim, and textured surfaces.
Read the guide ->