Construction Calculator

All the construction math you need on the job site, in one simple app. Enter your measurements and get instant answers: how many yards of concrete to order, how many bags, bundles of shingles, bricks, boxes of tile or gallons of paint.

🧱 CALCULATORS

• Concrete calculator: slabs, footings, beams, square and round columns. Cubic yards, waste allowance, ready-mix truck loads, and 80 lb / 60 lb / 40 lb premix bag counts

• Roof calculator: gable, hip and shed roofs. Roof pitch (x/12), angle and percent slope, rafter length with overhang, rafter count, roof area in squares, shingle bundles, underlayment rolls, ridge and hip cap length

• Pitch converter: pitch, degrees, percent and ratio

• Stair calculator: number of risers and riser height, treads, total run, stair angle, stringer length and a check against common US residential code limits

• Brick & block calculator: modular brick, queen brick and 4", 6" and 8" CMU blocks, with door and window openings subtracted and mortar volume

• Rebar weight calculator: bar sizes #3 to #11, weight per foot, weight per bar, total weight, and how many bars are in a given weight

• Tile calculator: tile count, boxes, thin-set bags and grout

• Paint calculator: wall and ceiling area from room size, gallons, the best combination of 5-gallon buckets, gallons and quarts, and primer

• Excavation calculator: pits, trenches and sloped excavations, soil swell, dump truck loads and soil weight

• Unit converter: feet-meters, cubic yards-cubic meters, pounds-kilograms, psi-MPa and more

📐 EASY TO USE

• Presets like 4" slab, footing, 12×24 tile or 8" CMU

• Dimensioned drawings show your numbers on the picture

• Large + / − buttons, easy to use with gloves

• Step-by-step solutions for every result

📄 SHARE AND SAVE

• Share a clean summary by text, email or any messaging app

• Save as PDF with the drawing, inputs and results

• Favorites and history for your most-used calculators

⭐ MORE

• Works offline, even where there's no signal

• US (imperial) and metric units

• English and Turkish

• Light and dark mode

• Free, no account needed

Made for contractors, builders, carpenters, masons, roofers, engineers, estimators and DIY homeowners.

Note: Results are estimates. Material quantities vary by product and installation. Follow your engineer's drawings and local building codes for structural work.