Construction Calculators
Every construction and home improvement calculator on the site, in one place - material quantities for concrete, paint, flooring, roofing, and more, grouped by project type.
Each tool shows its formula and a fully worked example, so you can double-check the method - not just trust a black-box number. Every calculation runs in your browser and nothing you enter is saved. Jump to a section, or scroll through all 15.
Foundation & hardscape
Concrete, gravel, and outdoor surfaces.
- Concrete Calculator - cubic yards, cubic feet, and bags needed for a slab, footing, or column.
- Gravel Calculator - cubic yards and tons of gravel for a driveway, path, or base layer.
- Paver Calculator - pavers needed for a patio or walkway, plus base gravel and sand.
- Mulch Calculator - cubic yards or bags of mulch for a garden bed.
- Fence Calculator - posts and panels needed for a fence line, straight or looped.
Interior finishing
Paint, flooring, tile, and walls.
- Paint Calculator - gallons of paint needed for a room, accounting for doors, windows, and coats.
- Tile Calculator - tiles and boxes needed for a floor or wall, with a waste allowance.
- Flooring Calculator - boxes of laminate, vinyl, or hardwood flooring needed for a room.
- Drywall Calculator - sheets of drywall, plus estimated screws and joint compound.
- Square Footage Calculator - total area of an irregular or multi-section room.
Roofing & exterior
Roofs, walls, and insulation.
- Roofing Calculator - roofing squares and shingle bundles, accounting for roof pitch.
- Brick Calculator - bricks needed for a wall, based on brick size and mortar joint.
- Insulation R-Value Calculator - combined R-value across multiple insulation layers.
Framing & structure
Stairs and lumber.
- Stair Calculator - number of steps, exact riser height, and stringer length from total rise.
- Board Feet Calculator - board footage for lumber pricing, from length, width, and thickness.
Frequently asked questions
Are these construction calculators free to use?
Yes - all 15 tools on this page are free, with no account or sign-up required.
Are these results accurate enough to submit for a permit or bid?
These tools are designed for planning and material estimates using standard industry formulas. For a structural project, a permit application, or a formal bid, confirm figures with a licensed contractor or engineer, since local codes and site conditions vary.
Why do most of these include a waste allowance?
Real installations always use more material than the bare geometric minimum, due to cuts, breakage, and layout patterns. Building in a waste allowance from the start avoids a mid-project trip back to the store.
Is any of the information I enter saved?
No. Every calculation runs directly in your browser - nothing you type is sent to a server or stored anywhere.
Looking for a different category? Browse all calculators on the homepage. For articles and updates about these tools, see all Construction Calculators posts.