BuildSmith: Construction Calc

TapForge Studios

Contains adsIn-app purchases

About this app

BuildSmith puts the numbers you need on a job site in one offline toolbox. Thirty-seven calculators across eleven trades, ten quick-reference sheets, and converters built for the way tradespeople actually measure — feet, inches and fractions.

No login. No setup. Every calculator works with the phone in airplane mode.

TRADE CALCULATORS

• Carpentry & framing — wall stud count, board feet, deck boards, trim and molding, common rafter length, stair rise/run and stringer layout
• Concrete & masonry — slab volume, footings and trenches, columns and sonotubes, CMU block walls, brick walls, rebar grids
• Electrical — Ohm's law and Watt's law, voltage drop, resistor and load networks, EMT conduit fill, box fill
• Low voltage — DC voltage drop, battery backup runtime, parallel speaker loads
• Drywall — sheets, mud, tape and fasteners
• Paint — gallons for walls and ceilings with coats and waste
• Flooring — boxes needed, tile counts, underlayment
• Ceilings — lay-in tile counts and suspended grid layout
• Roofing — roof area, squares, shingle bundles
• Site & layout — 3-4-5 squaring, right triangles, slope and grade, area and volume
• Converters — unit converter and inch/decimal/fraction conversion

REFERENCE SHEETS

Copper wire ampacity, lumber sizes, nail and screw gauges, concrete bag yields, roof pitch and slope factors, fraction/decimal/millimetre equivalents, drill and tap sizes, and more — the tables you would otherwise be searching for with dirty hands.

BUILT FOR THE FIELD

• Works completely offline — no signal needed in a basement or on a new pour
• Results update as you type, with the working shown
• Feet-and-inches and fractional input, not just decimals
• Star your most-used tools so they sit at the top of the home screen
• Save any calculation and pull it back up later
• Share a result as text — send the takeoff straight to your foreman or supplier
• Dark, high-contrast interface that stays readable in a truck or a lit-up attic
• No account, no cloud, no data leaving your phone

BUILDSMITH PRO

BuildSmith is free and fully usable. Pro is a single one-time purchase — never a subscription — and it unlocks:

• No banner or full-screen ads, anywhere in the app
• Every Pro reference sheet
• Unlimited saved-calculation history

Prefer not to pay? You can watch a short video to unlock everything for 24 hours whenever you need it.

WHO IT IS FOR

Carpenters, framers, concrete finishers, masons, electricians, low-voltage and fire-alarm technicians, drywall hangers, painters, flooring and ceiling installers, roofers, remodelers, general contractors, estimators, building inspectors, apprentices studying for a licence, and anyone who has ever done math on the back of a stud.

A NOTE ON ACCURACY

BuildSmith gives estimates and reference information for planning. Always verify quantities and code requirements against the governing code, engineered plans and manufacturer data for your specific job.

Built by TapForge Studios. Questions or a calculator you want added? [e-mail]

What’s new

Fix pay button.