All calculators

Concrete

• Concrete Slab Calculator Yards, bags & cost — patios, driveways, shed bases
• Concrete Footing Calculator Strip runs and pad footings by trench size
• Sonotube Calculator Bags of concrete per tube for piers and posts
• Concrete Block Calculator Blocks, mortar bags, and core fill for CMU walls
• Rebar Calculator Bars, sticks, ties & weight for a slab or footing grid
• Concrete Driveway Cost Calculator Installed cost by area, with concrete yards

Framing

• Stair Calculator Rise & run, stringer length, and IRC checks
• Framing Calculator Wall studs, plates & sheathing with costs
• Deck Calculator Boards, joists & screws from real row geometry
• Board Foot Calculator Lumber volume & cost from nominal dimensions
• Floor Joist Calculator Joist count, rim & span at any spacing
• Baluster Calculator Even spindle spacing under the 4 in guard rule
• Birdsmouth Calculator Rafter seat & heel cut, HAP and plumb angle by pitch

Roofing

• Roofing Calculator The whole materials list — shingles to drip edge
• Roof Pitch Calculator Rise & run to degrees, slope %, and area multiplier
• Rafter Length Calculator Span, pitch and overhang to cut length and board
• Roof Shingle Calculator Bundles, squares and underlayment from the footprint
• Gambrel Roof Calculator Barn-roof rafters, angles, ridge height & area
• Roof Sheathing Calculator 4×8 sheets, nails & cost from footprint and pitch
• Metal Roof Calculator Panels, cut lengths, screws & cost by profile
• Roof Pitch Multiplier The slope factor for every pitch, with chart
• Roof Truss Calculator Truss count and spacing along the ridge
• Snow Load Calculator Roof snow load in psf by ground load, pitch & ASCE factors

Aggregates

• Gravel Calculator Tons & yards for crushed stone and base
• Sand Calculator Paver bedding, sandbox and masonry sand by the ton
• River Rock Calculator Decorative rock with depth sized to the stone
• Asphalt Calculator Tons of hot mix & cost by area and depth
• Paver Base Calculator Gravel base & bedding sand under pavers, by the ton
• Fill Dirt Calculator Yards & truck loads with compaction built in
• Tonnage Calculator Tons of any aggregate from area, depth & density
• Limestone Calculator #57, screenings & large stone by the ton
• Road Base Calculator Dense-grade driveway lifts, compacted density
• Crushed Concrete Calculator Recycled base tons — the budget driveway
• Stone Dust Calculator Screenings for setting beds & paths
• Topsoil Calculator Yards, 40 lb bags & hauling weight
• Mulch Calculator Yards & 2 ft³ bags with coverage per yard
• Stone Calculator Tons of any stone — crushed, clean, or decorative
• Gravel Driveway Calculator All three lifts priced from one driveway size
• Landscape Calculator Tally every bed into one material order
• Compost Calculator Yards & 1 ft³ bags for beds and topdressing
• Rip Rap Calculator Armor stone for banks & slopes, by the ton
• French Drain Calculator Drainage stone, pipe & fabric for a trench
• Sod Calculator Pallets, slabs & cost for a lawn by size
• Gravel Size Chart #8 to rip-rap — what every screen number means
• Density of Granite Solid, crushed & DG — the reference numbers

Plumbing

• Pipe Volume Calculator Gallons, liters & water weight from any inner diameter
• Tank Volume Calculator Gallons of a cylinder or rectangular tank by size

Masonry

• Brick Calculator Bricks per ft², mortar bags, and courses
• Retaining Wall Calculator Blocks, caps, courses & drainage gravel with cost
• Mortar Calculator Bags of mortar mix for a brick or block wall

Fencing

• Fence Calculator Posts, rails, pickets & concrete with itemized cost

Siding

• Siding Calculator Squares & boxes of vinyl or lap siding, with cost
• Board and Batten Calculator Even batten spacing across a wall, plus trim & boards

Interior & finishes

• Drywall Calculator Sheets, screws, compound & tape for any room
• Paint Calculator Gallons by room size, coats & coverage
• Tile Calculator Tiles, boxes & thinset by floor size
• Flooring Calculator Plank & laminate in whole boxes, with underlayment
• Insulation Calculator Bags of batts for walls or attic, by package coverage
• Carpet Calculator Square yards to order from room size, with cost
• Grout Calculator Pounds & bags of tile grout by joint size
• Wallpaper Calculator Rolls for a room by the strip method, with repeat

Electrical

• Voltage Drop Calculator Volts & percent lost over any run, with the gauge that passes
• Box Fill Calculator NEC 314.16 conductor, device, clamp & ground fill

HVAC

• CFM Calculator Airflow from room volume and air changes per hour
• AC Tonnage Calculator Cooling BTU & tons from floor area and climate
• Furnace Size Calculator Heating BTU & furnace size by square footage

Measuring

• Square Footage Calculator Rectangles, circles & triangles with a running total
• Cubic Yard Calculator Length × width × depth to yards, meters & tons
• Cubic Yards to Tons Yards ↔ tons by material density, both directions

New calculators ship every few weeks — the roadmap covers 150+ tools across every trade.