Catalog
All construction calculators
Every free calculator on BuilderCalc, grouped by discipline. Each tool runs in your browser, supports imperial and metric units, and links back to the formulas and the codes it follows.
Concrete & Masonry Category page →
Concrete and masonry calculators — slabs, footings, rebar grids, brick walls and mortar take-offs with optional cost.
Rebar Calculator
Estimate total length, weight and number of bars for a rebar grid.
Concrete Footing Calculator
Calculate concrete volume, bags and cost for strip, pad or pier footings.
Concrete Slab Calculator
Volume, bags and cost for slabs, driveways, patios and floors.
Brick Calculator
Number of bricks and mortar bags for walls of any size.
Concrete Stairs Calculator
Concrete volume, bags and order amount for poured stairs with landings.
Concrete Column Calculator
Concrete volume and bag count for round (Sonotube) and square columns.
Foundation Calculator
Total foundation concrete: continuous footing, stem wall and slab-on-grade combined.
Roofing Category page →
Roofing calculators — roof pitch and angle, roofing squares, shingle bundles and waste factors for any pitch.
Framing & Carpentry Category page →
Framing and carpentry take-offs — lumber board feet, framing wall studs, staircase geometry and IRC code checks.
Staircase Calculator
Riser height, tread depth, stringer length and IRC code check for straight stairs.
Board Foot Calculator
Board feet for any quantity of dimensional or hardwood lumber, with optional cost.
Wall Stud Calculator
Count studs, plates and openings for a framing wall at 12, 16 or 24 OC.
Plywood Calculator
Plywood, OSB or sheet good count for any area in 4×8, 4×10 or 4×12 sheets.
Interior Finishes Category page →
Interior finish calculators — paint, drywall sheets and tile take-offs with deductions for doors and windows.
Paint Calculator
Gallons or litres of paint for walls and ceilings with door/window deductions.
Drywall Calculator
Drywall sheets for rooms with ceiling, door and window options.
Wall Area Calculator
Square footage of walls and ceiling with door and window deductions — single wall or whole room.
Grout Calculator
Pounds of sanded grout for any tile size, joint width and floor area.
Earthwork & Site Category page →
Earthwork and site work calculators — fill dirt, gravel, excavation volumes, truckloads and compaction factors.
Structural Category page →
Deflection, moments and loading calculations for structural design checks.
Beam Deflection Calculator
Maximum deflection for simply-supported, cantilever or fixed-fixed beams.
Moment of Inertia Calculator
Area moment of inertia for 9 cross-sections — rectangles, circles, I-beams and W-shapes.
Steel Beam Calculator
Pick the right W-shape from load, span, grade and deflection limit (AISC).
Beam Load Calculator
Maximum allowable uniformly distributed load for any AISC W-shape and span.
Column Load Calculator
Axial capacity for steel (AISC Euler buckling) and concrete (ACI 318) columns.
MEP Category page →
Mechanical, electrical and plumbing calculations — NEC-based wire sizing, pipe flow, HVAC loads.
Wire Size Calculator
NEC-based wire sizing with ampacity and voltage-drop check.
Electrical Load Calculator
NEC 220.82 dwelling-unit service size — 100, 150, 200 or 400 A.
HVAC Calculator
AC tonnage and furnace size from square footage, climate zone and insulation.
Pipe Flow Calculator
Velocity, head loss and pressure drop for water in pipes (Hazen-Williams).
Cost Estimators Category page →
Cost-primary estimators with labor, regional multipliers and finish-grade pricing for flooring, concrete and whole-project budgeting.
Flooring Cost Calculator
Boxes, underlayment and installed cost for hardwood, LVP, tile and more.
Concrete Cost Calculator
Installed cost for slabs, footings and columns — ready-mix or bagged with optional labor.
Construction Cost Calculator
Whole-project cost from square footage, project type, quality grade and region.
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