Home & Building tools
Material and project calculators: paint, concrete, tile, decking, roofing, and more.
Convert between BTU/hr and AC tons at 12,000 BTU per ton, or estimate tonnage from floor area.
Convert driveway area and compacted thickness into asphalt tons at 145 lb/ft³ and a cost at your $/ton.
Compute board feet for one or many boards (thickness × width × length ÷ 12) and price the lot at $/BF.
Convert slab, footing, column, or tube dimensions into cubic yards of concrete and 40/60/80-lb bag counts.
Build a labor/materials estimate line by line with overhead and profit margins, and export clean plain text.
Estimate decking boards (lineal feet and count), joists at your chosen spacing, and screws for a deck.
Convert wall and ceiling area into 4×8/4×10/4×12 sheet counts plus mud, tape, and screw estimates.
Turn a fence length into posts, rails, pickets or panels, and bags of concrete from the post spacing.
Compute drain gravel in cubic yards and tons for a trench, subtracting the perforated pipe's volume.
Turn an area and depth into cubic yards of gravel and tons at an editable density, with a waste factor.
Match roof area and rainfall intensity to a gutter size from an editable capacity table, plus downspouts.
Estimate cooling BTU from room size, insulation, sun, occupants, and kitchen, plus heating BTU by climate zone.
Find the insulation thickness needed for a target R-value by material, and count batt packages for an area.
Convert bed area and depth into cubic yards of mulch and the number of 2-cu-ft bags to buy.
Work out gallons of paint for a room from wall dimensions, doors, windows, and coats — with a buy-this-many answer.
Count pavers for a patio from the paver size, with waste, plus gravel base and bedding sand volumes.
Compute the water volume and weight in a pipe from inner diameter and length, with Schedule 40 presets.
Size a pond liner sheet from pond length, width, depth, and edge overlap using the standard formula.
Compute ramp length from a rise at 1:12 ADA slope, or turn rise and run into ratio, angle, and grade.
Count retaining wall blocks per course and total, plus cap blocks and gravel backfill volume.
Convert between rise/run, degrees, and x/12 roof pitch, and compute rafter length with overhang.
Convert a roof footprint and pitch into sloped area, roofing squares, and shingle bundles with waste.
Add up lawn sections into total square feet and convert to sod pallets and rolls with a waste factor.
Turn a total rise into riser count and height, tread run, total run, and stringer length, with code flags.
Count studs for a wall at 16 or 24 in on center, with extras for corners and openings, plus plate lumber.
Count tiles and boxes for an area from tile size and grout gap, with layout-aware waste defaults.
Estimate cubic yards and tons of topsoil from area and depth, using an editable 1.1 t/yd³ density.
Work out wallpaper rolls from wall size, roll dimensions, and pattern repeat, including usable strips per roll.
About Home & Building tools
Twenty-eight calculators for estimating home improvement and construction projects. The material estimators answer "how much should I buy?" for paint, concrete, gravel, mulch, topsoil, sod, pavers, tile, drywall, wallpaper, and insulation — each converting your measurements into purchasable quantities like bags, sheets, rolls, or cubic yards, with waste factors built in so you're not driving back to the store mid-job.
Beyond materials there are structural and layout calculators: stud counts for framing a wall at 16 or 24 inches on center, stair stringer geometry with building-code flags, deck boards and joists, fence posts and pickets, roof pitch and shingle bundles, and retaining wall blocks. The mechanical side covers HVAC BTU and AC tonnage sizing, gutter capacity, pipe volume, French drain gravel, and ADA-compliant ramp slopes. A line-item estimate generator ties projects together with labor, materials, overhead, and margin.
The calculators use standard industry formulas and sensible defaults — a homeowner can accept them as-is, while a contractor can edit densities, spacings, and waste percentages to match local practice. They're estimating aids, not engineering advice: for structural work, check the numbers against your local building code. Everything runs free in your browser, which works just as well on a phone in a lumber aisle.