Free Construction Calculators
17 code-cited calculators available now · 21 more on the way. Every result cited against IRC, ASTM, DOE, NWFA, or ICPI published standards.
Available Now 17 live
- Stair CalculatorRise, run, and stringer length with IRC dimensional references.Available now →
- Sheetrock CalculatorDrywall sheets, mud, tape, and screws — adjusts by finish level. Cites ASTM C36, C840 + IRC §721.Available now →
- Paver CalculatorPavers, base, edge restraint, polymeric sand — patio, walkway, driveway, fire pit. Cites ICPI Tech Spec.Available now →
- Attic Insulation CalculatorBags of blown insulation to hit your target R-value — accounts for existing depth. DOE climate-zone table.Available now →
- Hardwood Flooring CalculatorBoards, cartons, and install materials by layout pattern and room shape. NWFA-sourced waste factors.Available now →
- Laminate Flooring CalculatorPlanks, cartons, underlayment — AC-rating guide + door-clearance flag.Available now →
- Vinyl Flooring CalculatorLVP cartons, underlayment, adhesive, and moisture barrier. Click-lock / glue-down / loose-lay branching with concrete-vs-wood subfloor handling. RFCI-cited 10% / 15% waste.Available now →
- Carpet CalculatorLinear yards, padding, and tack strip — with seam-aware roll-width math (12′, 13′2″, 15′), run-direction selector, and L-shape support. CRI 105 industry-practice waste factors.Available now →
- Deck Joist CalculatorJoist count, lineal feet, hanger count, and IRC R507.5 span-table dimensional check. Multi-species + cantilever rule + L-shape support.Available now →
- Deck Beam CalculatorPrescriptive beam size per IRC R507.5 and AWC DCA-6 from tributary width, species, and post spacing. Compliance disclosure + composite max-spacing warning.Available now →
- Deck Railing CalculatorPost count, baluster count, top/bottom rail LF, and handrail trigger per IRC R312 + R311.7.8. L-shape corner-post deduction, 4-inch sphere check, composite manufacturer max-spacing warning, AWC DCA-6 Figure 30 post spacing.Available now →
- Stair Stringer CalculatorStringer length (Pythagorean), notch geometry, throat depth (AWC DCA-6 Fig. 28 5.5 in min), and stringer count with itemized IRC R311.7.5.x compliance disclosure. PT 2×12 / PT 2×10 / engineered LVL material variants.Available now →
- Concrete Slab CalculatorCubic yards, 80lb and 60lb bag counts, ready-mix comparison — IRC R506.1 thickness check built in.Available now →
- Concrete Block CalculatorCalculate CMU blocks, mortar bags, and waste for any concrete block wall.Available now →
- Fire Pit Paver CalculatorPavers per course, wall height, and base materials for any fire pit diameter. Dry-stack or mortared. Cites ICPI Tech Spec 2.Available now →
- Blown-In Insulation R-Value CalculatorR-value from depth (forward) or required depth from target R (inverse) — AttiCat fiberglass + Greenfiber SANCTUARY / SANCTUARY DEFENSE cellulose. ASTM C739 settling reference + DOE + ENERGY STAR climate-zone targets + estimated bag counts from current manufacturer coverage charts.Available now →
- Drywall Mud CalculatorJoint compound gallons, tape lineal feet, and drywall screws by GA-214 finish level (Level 4 / Level 5 / Knockdown) and tape type (paper vs fiberglass mesh). USG-cited coverage rates + IRC R702.3.5 fastener math.Available now →
Browse by Category
21 more calculators on the way — bookmark this page or check back weekly.
Stairs & Rails
- Stair CalculatorAvailable now →
- Stair Stringer CalculatorAvailable now →
- Concrete Stairs CalculatorOn the roadmap
- Stair Calculator with LandingOn the roadmap
- Carpet for StairsOn the roadmap
Concrete
- Concrete Slab CalculatorAvailable now →
- Concrete Footing CalculatorOn the roadmap
- Concrete Block CalculatorAvailable now →
- Concrete for a 10x10 SlabOn the roadmap
- Fence Posts per Bag of ConcreteOn the roadmap
Drywall & Sheetrock
- Sheetrock CalculatorAvailable now →
- Drywall Mud CalculatorAvailable now →
- Drywall for a 10x12 RoomOn the roadmap
Roofing
- Roof Shingle CalculatorOn the roadmap
- Rafter Length CalculatorOn the roadmap
- Roof Truss CalculatorOn the roadmap
- Shingles per BundleOn the roadmap
Flooring
- Hardwood Flooring CalculatorAvailable now →
- Laminate Flooring CalculatorAvailable now →
- Vinyl Flooring CalculatorAvailable now →
- Carpet CalculatorAvailable now →
- Vinyl Plank Cost per Square FootOn the roadmap
- Tile for 12x12 RoomOn the roadmap
Exterior & Siding
- Vinyl Siding CalculatorOn the roadmap
- Siding for 1500 sqft HouseOn the roadmap
Landscaping
- Sod CalculatorOn the roadmap
- Mulch CalculatorOn the roadmap
- Gravel Driveway CalculatorOn the roadmap
- Paver CalculatorAvailable now →
- Fire Pit Paver CalculatorAvailable now →
Framing & Lumber
- Deck Joist CalculatorAvailable now →
- Deck Beam CalculatorAvailable now →
- Deck Railing CalculatorAvailable now →
- Stud CalculatorOn the roadmap
- Plywood CalculatorOn the roadmap
- Board Foot CalculatorOn the roadmap
Insulation
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