BuildCalc: Contractor Estimate

56 calculators for concrete, framing, roofing, drywall, electrical and more. Turn results into client-ready estimates and export to PDF. Feet-inches or metric.

Material quantities, waste, and cost — then a client-ready estimate. BuildCalc puts 56 construction calculators across 13 trades on one screen, so you can measure, price, and send a quote from the job site.

WHY CONTRACTORS AND BUILDERS USE IT

• Enter dimensions the way you measure them: feet, inches and fractions, or metric
• Every result includes a waste factor you control and a cost line you can edit
• Save calculations to a project, then turn the project into a professional estimate
• Export estimates to PDF with your logo, on Letter or A4 paper

13 TRADES, 56 CALCULATORS

• Concrete: slabs, footings, columns, stairs, bags and yards
• Framing: studs and plates, plywood, board feet, joist spans, headers, stair stringers
• Roofing: shingles, metal panels, underlayment, ridge cap, gutters, soffit and fascia
• Drywall: sheets, joint compound, tape, screws
• Flooring: hardwood, tile, baseboard, stairs
• Painting: interior, exterior, primer, wall area with door and window deductions
• Masonry: brick, block, mortar
• Electrical: voltage drop, wire size, conduit fill, Ohm's law
• Plumbing: pipe sizing, fixture units, drain slope, water heater sizing
• HVAC: BTU load, heat load, duct sizing
• Insulation: batts and blown-in, R-value
• Landscaping: mulch and gravel, sod, fence, excavation
• General: aggregate tonnage, grade and slope, unit conversions

ESTIMATES THAT WIN JOBS

• Materials and labor sections with markup, tax and discounts
• Clients and projects kept together
• One tap to a PDF you can share from your phone

REFERENCE TABLES ON THE JOB SITE Floor-joist and header spans from the 2021 IRC and conduit fill from the 2023 NEC, with the load case and source shown on every result.

BUILDCALC PRO The free version includes selected trades and one project, with ads. BuildCalc Pro unlocks every calculator, unlimited projects, client estimates with PDF export and your logo, and removes ads. Pro is available as a monthly or annual auto-renewing subscription or as a one-time lifetime purchase. A free trial may be offered on the annual plan; any unused portion of a free trial is forfeited when you purchase a subscription. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. Manage or cancel subscriptions in your Apple Account settings. Prices are shown in the app in your local currency before you buy.

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Results are estimates for planning and ordering. Verify quantities, spans and sizes against your locally adopted code or a licensed professional before building. IRC and NEC are trademarks of their respective owners; BuildCalc is not affiliated with the International Code Council or the National Fire Protection Association.