How much material do I need?

Free, no-sign-up calculators that tell you exactly how much to buy for your next home project — before you get to the store. Brand-neutral, mobile-friendly, and built to be accurate.

Paint Calculator Gallons of paint & primer for any room. Primer Calculator How much primer your surface needs. Exterior Paint Calculator Paint for siding & exteriors. Deck Stain Calculator Stain & sealer for decks and fences. Wallpaper Calculator Rolls of wallpaper per room. Flooring Calculator Boxes of flooring with waste factor. Concrete Calculator Bags or yards for slabs & post holes. Mulch Calculator Yards & bags for any garden bed. Gravel Calculator Yards & tons of gravel, sand or topsoil. Drywall Calculator Sheets, compound, tape & screws. Tile Calculator Tiles & boxes for any surface. Paver Calculator Pavers for patios & walkways. Sod Calculator Pieces & pallets for a new lawn.

Why estimate before you shop?

Buying building materials is a guessing game for most people. Buy too little and you're making a second trip — often to find the dye lot or product is now different. Buy too much and you've wasted money on paint, flooring, or stain you'll never use. A good estimate up front saves both.

Every calculator on EstimateMaterial.com uses the same standard coverage figures the pros use, shows you the math behind the result, and lets you print a tidy shopping list. We don't sell materials and we're not tied to any brand — so the numbers are yours to trust.

Start with the Paint Calculator

Our most-used tool. Enter your room dimensions and the paint calculator subtracts doors and windows, factors in the number of coats, and tells you how many gallons (and quarts) of paint and primer to buy. From there, explore the full set of calculators above — from paint, primer, and stain to concrete, mulch, gravel, and flooring.