Construction Calculator Pro

Construction Calculator Pro puts 139 construction calculators in one app: concrete, rebar, roofing, framing, drywall, masonry, excavation and more. Type in feet, inches and fractions or in metric, and get the answer in every unit with the steps behind it. Made for contractors, carpenters, handymen, engineers and DIY builders.


BUILT FOR THE JOB SITE
• Answers update as you type. No calculate button.
• Feet and inches with fractions to 1/16, 1/32 or 1/64, or millimeters and meters.
• Switch between imperial and metric with one tap.
• Every result in every unit: cubic yards, cubic feet, cubic meters, gallons and more.
• See the formula, your numbers and the source, step by step.
• Worked examples with checked answers in every calculator.
• Copy or share results with the steps for your client, crew or supplier.
• Works offline on the job site. No account and no sign in.
• Light and dark mode, plus favorites and recents for daily tools.


CONCRETE CALCULATOR
Find out how much concrete you need for a slab, driveway, patio, footing, column, sonotube or pier, wall or stairs. Get cubic yards for ready mix, how many 60 lb or 80 lb bags to buy, plus cement, sand, gravel and water. Also concrete weight, strength grades, cylinder tests and formwork area.

REBAR CALCULATOR
Rebar weight by size, length and count for #3 to #11 and metric bars. Rebar spacing and how many bars fit, slab mesh, beam and column bars with stirrups and ties, lap length, steel plate and pipe weight.

ROOFING CALCULATOR
Roof area and roofing squares, roof pitch in degrees and rise in 12, common rafter length, hip, valley and jack rafters, asphalt shingle bundles with underlayment and nails, metal roof panels and roof tiles.

FRAMING AND CARPENTRY
Stud count and layout at 16 or 24 inches on center, wall framing with plates and sheathing, board feet of lumber, deck boards, joists and screws, plywood and OSB sheets, baluster spacing, equal spacing for fence posts, miter angles and crown molding cuts.

DRYWALL, TILE, PAINT AND FLOORING
How many drywall sheets, screws and tape for walls and ceilings. Floor and wall tile with grout, paint gallons by coats, laminate and vinyl plank flooring, wallpaper rolls, baseboard, plaster and screed.

MASONRY
Brick walls, concrete block and CMU walls, mortar, stone walls and brick columns.

EXCAVATION, GRAVEL AND PAVING
Excavation and trench volume with soil swell, backfill, truck loads, gravel and road base by the yard or ton, asphalt tons, pavers with bedding sand, curbs, grades and slopes.

ELECTRICAL AND PLUMBING
Voltage drop and wire size in AWG or mm², amps and breaker size, Ohm's law, lighting in lumens and foot candles, pipe flow and friction loss, pump size, drain pipe slope and water tank size.

STRUCTURAL AND LAYOUT
Beam moment, shear and deflection, footing size from load and soil, slab and column loads, section properties, stair layout with risers and treads, right triangles, square corners with the 3 4 5 rule, and square footage of rectangles, triangles, circles and lots in acres.

FEET AND INCHES CALCULATOR AND CONVERTERS
Add, subtract, multiply and divide feet, inches and fractions like a tape measure. Convert length, area, volume, weight, pressure, force, slope, temperature, flow and power.

COST ESTIMATING
Construction cost by square foot, labor cost, unit rates, and a quote with overhead, markup and profit.

Whether you are pouring a slab, framing a wall or roofing a house, Construction Calculator Pro gives you the numbers in seconds.

One purchase unlocks all 139 calculators. There is no subscription and there are no ads.

Results are estimates for planning and ordering. Structural work must be designed and checked by a qualified professional under your local building code.

Recent changes:
• Improved precision for complex construction calculations.
• Refined calculation accuracy and reliability.
• Enhanced performance for a smoother experience.

Thank you for using Construction Calculator Pro.