Contractor Calculator: Jobsite

Jobsite measurements. Clear material quantities. Every step explained.

Contractor Calculator helps contractors, carpenters, remodelers and hands-on builders plan materials without a signal. Enter dimensions, include a waste allowance, see how the result was calculated, and save the estimate with its project.

USEFUL TOOLS, FREE • Concrete: rectangular slab volume, ready-mix order increments, and 60 lb or 80 lb bag alternatives. • Paint: wall area, opening deductions, whole coats, coverage, waste and whole-unit order quantities. • Square Up: a target diagonal and the difference from your measurement. Check both diagonals and all sides. • Projects: save, rename, delete, revisit and share estimates, including their inputs and assumptions.

FEET, INCHES AND FRACTIONS Use a dedicated measurement editor with quick fraction keys. Enter feet and inches, decimal values, or explicit metric units. Convert current inputs between imperial and metric. Choose fraction display precision from 1/8 through 1/64 inch.

SHOW THE MATH Open the calculation breakdown to see the original inputs, formula, base quantity, waste allowance, rounding and optional material cost. Enter your own supplier prices and choose a cost currency. No exchange rates or guessed material prices.

OPTIONAL LIFETIME PRO Preview the Pro tools before you buy. One non-consumable in-app purchase unlocks: • Decking: board courses, whole-stock quantities, waste and costs. • Stairs: equal risers, treads, run, pitch and an envelope diagonal for planning. • Board Feet: lumber volume, quantity, waste allowance and cost. No subscription. No intrusive advertising.

OFFLINE AND PRIVATE Calculations and saved projects work offline. No account, app-operated backend or analytics tracking. Projects stay in local app storage; you choose what to share. Apple handles purchases, and an internet connection is required to buy or restore Pro.

BUILT FOR IPHONE Native controls, light and dark appearances, large text support, and accessible labels for jobsite use.

Estimates are for planning only. Verify dimensions, material yields, supplier order increments and site conditions. Results are not structural engineering approval or a guarantee of building-code compliance. Stair envelope diagonals are not finished stringer cut lengths. Material costs exclude labor, delivery and taxes. Paint uses US gallons in imperial mode.

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