Feet & Inch Calc: Construction

Pay once. No ads, no subscription, no account, works completely offline.

TradeCalc is a feet-inches-fractions calculator built for the jobsite, plus 71 trade calculators that all share the same engine. Type 12' 4-1/2" + 3' 7-3/8" and see the answer instantly in feet-inches-fractions, decimal inches, decimal feet, and metric — all at once.

WHY TRADECALC
- One-time purchase. No ads, no subscription traps, no account required.
- Zero permissions, zero network access — nothing ever leaves your phone.
- Exact math. Fractions are computed as exact fractions, never rounded until the moment they're displayed on screen.
- Every result shows how confident you should be in it: exact math, a published manufacturer constant, a building-code value you can edit for your jurisdiction, or a rule of thumb — clearly labeled, every time.
- Editable calculation tape with memory registers, plus projects with CSV/PDF export of your material lists.
- Metric mode built in, not bolted on.

THE CALCULATORS

Conversions & fractions: length, area, volume, weight, density, angle, temperature, percent/discount/markup, cost per unit, fraction calculator, split into equal parts.

Geometry & layout: right triangle (rise/run/diagonal), squareness check (diagonals), 3-4-5 check, trigonometry, regular polygons, circles, arcs, composite area, composite volume, slope/grade.

Concrete, masonry & site: slab, footing, column/post hole, concrete stairs, rebar layout, concrete block, brick, excavation, aggregate/gravel, topsoil.

Framing & roofing: wall studs, floor joists, board feet, lumber nominal-to-actual, common rafter, hip/valley rafter, jack rafters, gable wall studs, compound miter, roof area, shingles, roof sheathing.

Stairs & railings: full stair layout, stringer marking, winder stairs, baluster spacing, raked railing.

Finishes: drywall, paint, tile, flooring, carpet, wallpaper, insulation, siding.

Exterior: fence, deck, post holes, pavers, gravel path.

Plumbing, electrical & more: pipe offsets, rolling offset, pipe water volume, drain slope, Ohm's law, voltage drop, resistor color code, firewood, tank capacity, labor cost.

Building code values (stair rise/run, baluster spacing, drain slope, and more) are stored as editable, dated data — not hardcoded — so you can match your local code and see exactly which rule set is active on every result.

Available in English, French, and Spanish.