Construction & Home Improvement Calculators
Free, no-signup material estimators. Every calculator shows its formula, a worked example you can verify by hand, and honest limitations — no black boxes.
Concrete & Masonry
Yards, bags, bricks and blocks — how much to order before the truck (or the pallet) shows up.
Concrete Slab Calculator
Length × width × thickness → cubic yards and meters, with waste allowance.
Concrete Bag Calculator
Slab size → number of 40, 60 or 80 lb premix bags to buy.
Concrete Driveway Calculator
Cubic yards for any driveway, plus an installed-cost range.
Concrete Column Calculator
Round column volume from diameter and height.
Concrete Footing Calculator
Continuous footing volume from length, width and depth.
Brick Calculator
Wall size → modular brick count with mortar joints, plus waste.
Concrete Block Calculator
Wall size → CMU block count at the standard 1.125 blocks per ft².
Mortar Calculator
Blocks or bricks to lay → 80 lb mortar bags to buy.
Retaining Wall Calculator
Wall blocks, cap blocks and base gravel for a segmental wall.
Yard, Paving & Fence
Bulk materials by the yard and ton, plus pavers, sod and fence materials.
Gravel Calculator
Area × depth → cubic yards and tons, with adjustable density.
Mulch Calculator
Area × depth → cubic yards, plus 2 ft³ bag count.
Topsoil Calculator
Area × depth → cubic yards and bag count for topsoil.
Sod Calculator
Lawn area → sod rolls and pallets, with waste allowance.
Paver Calculator
Patio area → paver count, base gravel and bedding sand.
Fence Calculator
Fence length → posts, rails, pickets and post-hole concrete.
Deck Board Calculator
Deck dimensions → number of boards, accounting for board width and gaps.
Interior: Floors, Walls & Tile
Boxes, sheets, gallons and bags for indoor projects.
Hardwood Flooring Calculator
Room area → boxes of hardwood, with cutting waste included.
Laminate Flooring Calculator
Room area → boxes of laminate flooring to buy.
Vinyl Plank Flooring Calculator
Room area → boxes of LVP, with a lower cutting waste.
Paint Calculator
Wall area minus doors/windows → gallons per coat and total.
Drywall Calculator
Wall area → number of 4×8 ft sheets, with waste allowance.
Tile Calculator
Floor area → number of tiles, with waste allowance.
Tile Grout Calculator
Tile size and joint width → pounds and bags of grout.
Thinset Calculator
Tile area and trowel size → 50 lb bags of thinset mortar.
Room BTU Calculator
Rule-of-thumb cooling estimate by room size and climate. Estimate only.
Roof & Exterior
Squares, bundles and siding — measured the way suppliers sell them.
Roofing Calculator
Footprint and pitch → roofing squares and shingle bundles.
Siding Calculator
Wall area minus openings → siding squares to order.
Project Cost Calculators
Installed-cost ranges with editable rates — sanity-check any contractor quote before you sign.
Deck Cost Calculator
Deck area → installed cost range, with rates you can adjust.
Painting Cost Calculator
Paintable area → interior painting cost range.
HVAC Cost Calculator
Home size → system tons and replacement cost range. Budget aid only.
Flooring Cost Calculator
Floor area → installed flooring cost range.
Drywall Cost Calculator
Wall area → hang-and-finish cost range.
Tile Cost Calculator
Tile area → installed tile cost range.
Guides
Cost breakdowns and troubleshooting, written to the same honest standard as the calculators.