Contractor Calc Pro

Stop juggling spreadsheets on the jobsite. Contractor Calc Pro puts 20 essential construction calculators in your pocket — instant material estimates with real costs.

FREE CALCULATORS
- Drywall Estimator — walls + ceiling sheets, screws, tape, mud & corner bead
- Stair Calculator — rise, run, stringer length with IRC code pass/fail
- Tap & Drill Chart — searchable UNC, UNF, Metric & NPT reference

UNLOCK PRO (one-time — no subscription, ever)
- Gutter & Downspout — SMACNA sizing from roof area + rainfall
- Insulation R-Value — IRC 2021 requirements by climate zone
- Deck Materials — full BOM: boards, joists, posts, hardware, footings
- Rebar Calculator — slab, footing & wall modes with cut list
- Chimney & Flue — NFPA 211 flue sizing + materials
- Septic System — tank, drain field & trench sizing by soil type
- Spray Nozzle — GPA application rate + tank mix volumes
- Board Feet — lumber volume and cost by species
- Framing — stud count, plates, king/jack/cripple studs
- Concrete — slab & pier volume, cubic yards, 60/80 lb bag counts
- Roof Pitch — rafter length from pitch or angle
- Roof Area — sloped surface from building footprint
- Shingle Estimator — squares, bundles, underlayment, ridge cap
- Hip/Valley Rafter — hip run, rafter length, jack common difference
- Crown Molding — compound miter angles for flat & nested cuts
- Paint — gallons + primer from room dimensions
- Fence — posts, pickets, rails & concrete for any fence run

BUILT FOR THE JOBSITE
- Fraction input — type 5 1/2, 5' 6-1/2", or decimals
- Set your own material prices in Settings for accurate local estimates
- Save calculations by job name — recall them anytime
- Export professional PDF estimates to share with clients
- Tap & Drill favorites — pin the sizes you use most
- Calculate offline — no account, no tracking, no ads

One payment. No subscription. No ads. No personal data collected — just anonymous usage diagnostics. Your estimates and quotes stay on your device.