Construction Calculator Pro

Construction Calculator Pro: a feet-inch-fraction construction calculator with stair, rafter, framing, drywall and concrete calculators, plus an AR tape measure, spirit level and stud finder. One-time unlock, no subscription, no ads. Fully in English and Spanish.

For contractors, carpenters, framers, concrete finishers, masons, drywallers and remodelers. One app for the numbers, the measuring and the paperwork, built to work with gloves on and zero bars of signal.

REPLACES A HANDHELD CONSTRUCTION CALCULATOR, AND DOES MORE
If you've used a dedicated feet-inch-fraction construction calculator on site, Construction Calculator Pro does that math and then some. Type "6 ft 9 1/2 in + 2 ft 3/4" and it just works: feet, inches, and fractions, added, subtracted, multiplied, and divided with no rounding drift. A real fraction key, voice entry, one-tap unit conversion, and a full undo tape. No separate device to charge, lose, or leave in the truck. It's the calculator that's already in your pocket.

TEN TRADE CALCULATORS, EACH WITH A TO-SCALE DIAGRAM
• Stairs: risers, riser height, tread, total run, stringer, stairwell opening
• Roof & Rafters: pitch, plumb cut, cut length, tail, rise, board stock
• Concrete: cubic yards, cubic feet, 60/80 lb bags, weight
• Wall Framing: stud count, plate lumber
• Drywall: net area, 4x8 and 4x12 sheet counts
• Masonry: CMU blocks, bricks, mortar bags
• Circle, Polygons, Square-Up, and 3D Shapes: area, perimeter, volume, miter and diagonal

MEASURE AND INSPECT
• AR tape measure: point the camera, tap two points, read the distance
• Unit converter: lengths, areas, slopes, and survey measures
• Spirit level: linear, bullseye, and a locking torpedo vial with haptics
• Stud finder: sweep the wall for studs and metal
• Sound meter: a phone-mic estimate of jobsite noise
• Inspector: camera and flashlight for tight, dark spaces
• Topography: map floor dips, crowns, and flatness

SAVE THE PROOF, SHARE A CLEAN RECORD
Save any measurement, angle, or result, auto-named with type, date, time, and an optional jobsite location. Attach photos, mark them up, then export a branded PDF or PNG ledger, or back the whole set up to a .plumb file. Turn on Custom Branding to stamp your own business name and logo on every export.

WORKS WITH ZERO BARS
Your measurements, photos, and notes live on the device. No account, no login, no cloud. Measure in a basement, a bare shell, or the middle of nowhere. (Purchases are processed securely through Google Play and RevenueCat.)

ENGLISH AND SPANISH
The whole app, including your exports, in English or Spanish.

BUILT FOR THE JOBS YOU DO EVERY DAY
• Stair stringer calculator: riser count, riser height, tread, total run and stringer length from the total rise
• Rafter and roof pitch: cut length, plumb cut and rise
• Drywall calculator: net wall area and 4x8 or 4x12 sheet counts
• Concrete calculator: cubic yards and 60 or 80 lb bags
• Framing and lumber: stud count and plate lumber for a wall
• Block and brick: CMU blocks, bricks and mortar bags

TRY IT FREE
Start with a 7-day free trial of everything. After that, a single one-time purchase unlocks Construction Calculator Pro for life, with no subscription.

MORE FROM BEST PRACTICE
The single-tool apps for roof pitch, concrete, the AR tape measure and the spirit level are a tap away in Settings when the crew wants one tool on its own.

A note on accuracy: measurements and calculations are fast estimates for planning and reference. For cuts, code, or anything safety-critical, verify with professional equipment and qualified judgment.

Recent changes:
Same exact math, new hard hat. The bold yellow icon is supposed to look like a calculator. Your mileage may vary.

Recently: now called Construction Calculator Pro, and in Spanish, drywall, concrete, masonry and shape results show their units in Spanish.