OpusCalc Pro: Contractor Calc

Try all 11 calculators free. Concrete, stairs, framing & more — in feet, inches and fractions.

OpusCalc Pro is a professional construction calculator for contractors, framers, and tradespeople — built for feet, inches, and fractions on the job site.

Try all 11 calculators free. Get IRC-compliant stair layouts, concrete yardage, stud counts, rafter lengths, drywall sheets, and more — with a custom imperial keyboard designed for field use.

11 PROFESSIONAL CALCULATORS

Stair Stringer: Get 2021 IRC-compliant layouts in seconds, including exact riser heights, tread counts, and total run.

Roof Rafter: Master common, hip, and valley rafters with precise fractional outputs for any pitch.

Stud Count: Calculate field studs, corners, T-wall intersections, openings, and plate material with adjustable 5%, 10%, or 15% waste margins.

Drywall: Estimate sheet counts from gross area minus doors and windows, with adjustable waste.

Paint: Calculate gallons needed by coat count, adjusted for doors and windows.

Flooring and Tile: Convert any area into exact tile or box counts with adjustable waste factors so you never run short.

Concrete Volume: Estimate cubic yardage for slabs, columns, and footings, including pre-mix bag counts.

Block and Brick: CMU block and brick estimator with mortar bag counts and adjustable waste margins.

Right Angle: Square up any layout instantly using 3-4-5 triangle math.

Area and Volume: General area and cubic yard calculator with waste margin.

Fractions: Convert between fractions and decimals in one tap.

PROJECT MANAGEMENT (OPUSCALC PRO)

With an OpusCalc Pro subscription, save calculations to named projects, sync across devices, and export branded PDFs via AirDrop, email, or Files. Your work is saved locally first and syncs to the cloud automatically when online.

FIELD READY

A high-contrast dark mode designed for readability in any lighting, featuring a custom imperial keyboard for fast fractional input in feet, inches, and fractions — the way you actually measure on the job site.

OPUSCALC PRO SUBSCRIPTION

Try all 11 calculators free before subscribing. Unlock unlimited calculations with a monthly or yearly plan.

Payment is charged to your Apple ID. Subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings.

Support: support@opuscalc.com

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