Plan it. Measure it. Build it.
Free interactive calculators for DIY and home improvement projects — concrete, paint, flooring, decking, and more.
Each calculator turns your measurements into exact material quantities — bags of concrete, gallons of paint, boxes of flooring — accounting for waste and standard package sizes, so you buy the right amount the first time.
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Whether you're pouring a slab, painting a room, laying new flooring, building a deck, or insulating an attic, start with the project type below. Every result includes a waste allowance and rounds up to real-world package sizes, so there's no guessing at the store.
Enter a room's dimensions once, then continue into Paint, Flooring, Drywall, or Insulation with them pre-filled.
Calculate concrete volume and ready-mix or bag quantities for slabs, footings, and posts.
Calculate how much paint you need for a room, including doors, windows, coats, and cans.
Calculate how many planks, tiles, and boxes of flooring you need for a room.
Calculate how many drywall sheets, screws, and joint compound buckets you need for a room.
Calculate how many deck boards you need, compared across standard board lengths.
Calculate how many tiles, boxes, and how much grout you need for a tiling project.
Calculate how many fence panels and posts you need, and concrete for the post holes.
Calculate how many rolls, batts, or bags of insulation you need for an area.
Calculate roof surface area from footprint and pitch, and material bundles needed.