Calculate flooring, paint, tile, and wallpaper quantities and costs — including waste factor and sales tax. Multi-room support.
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This estimator turns room dimensions into a purchase list: total area = Σ(length × width), then a waste factor (typically 10%) is added for cuts, mistakes, and future repairs, and the total is divided by each product's coverage to get whole units — ceil(area × 1.10 ÷ coverage) — before sales tax is applied. The same dollars matter twice: a project's true return is ROI = (added resale value − project cost) ÷ project cost. National cost-vs-value data (Remodeling) shows most mid-range jobs recoup only 60–80% of their cost at resale, so buyers who expect to move soon should favor cheap, high-visibility upgrades over full gut renovations.
National averages for mid-range projects. Bars show the share of project cost typically recouped when the home sells; the right edge is the 100% break-even point.
Carlos installs vinyl plank in a 16 × 14 ft living room and a 12 × 3 ft hallway. Boxes cover 20 sq ft at $45 each, he budgets 10% waste, and his state charges 8.25% sales tax.
Calculate material quantities and costs for flooring, paint, tile, and wallpaper. Multi-room support, waste factor. Free, no signup.
Buying too little material means extra trips to the store and project delays. Buying too much wastes money. This calculator helps you get the right amount the first time, including a waste factor for cuts, breakage, and future repairs.
Flooring (boxes of planks or tiles), Paint (gallons with coverage area), Tile (square foot boxes), and Wallpaper (rolls). Each type has its own default coverage per unit, which you can adjust. Add multiple rooms to calculate the total material needed for your entire project.
The waste factor adds extra material to account for cuts, mistakes, damaged pieces, and future repairs. A 10% waste factor is standard for most projects. For diagonal tile patterns or complex room shapes, use 15%. For paint with two coats, double the coverage calculation.
A standard waste factor of 10% is recommended for most flooring projects. For diagonal patterns, irregular rooms, or premium materials, use 15%. This covers cuts, mistakes, and leaves spare planks for future repairs.
One gallon of paint typically covers 350 square feet with one coat. For two coats, you need double the paint. Measure your wall area (length × height) and divide by 350 to get the number of gallons.
Yes. Enter your local sales tax rate and the calculator adds it to the material cost. This gives you the true total cost of your project including tax.
Yes. Add as many rooms as needed. Each room can have a different name and dimensions. The calculator sums all rooms and gives you the total material needed and total cost.
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