TrowlCalc · Field-ready estimating tools
Construction calculators that answer in materials, not math.
Yards, bags, sheets and boards — waste included, cost estimated, rounded the way suppliers actually sell.
Concrete
- Concrete Slab Calculator Yards, bags & cost for slabs, patios and driveways
- 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 & roofing
- Stair Calculator Rise & run, stringer length, and IRC checks
- Framing Calculator Wall studs, plates & sheathing with costs
- 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 & area from two pitches
- Roof Sheathing Calculator 4×8 sheets & nails 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
- 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
- Roof Truss Calculator Truss count and spacing along the ridge
- Baluster Calculator Even spindle spacing under the 4 in guard rule
- Birdsmouth Calculator Rafter seat & heel cut, HAP and plumb angle by pitch
- Stair Stringer Cut Sheet A printable, dimensioned stringer layout from total rise
- Snow Load Calculator Roof snow load in psf by ground load, pitch & ASCE factors
Aggregates & plumbing
- 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
- Fill Dirt Calculator Yards & truck loads with compaction built in
- Tonnage Calculator Tons of any aggregate by 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
- Truck Bed Calculator Yards per trip from bed size & payload sticker
- Pipe Volume Calculator Gallons, liters & water weight from any inner diameter
- Tank Volume Calculator Gallons of a cylinder or rectangular tank by size
Masonry, interior & more
- Brick Calculator Bricks per ft², mortar bags, and courses
- Retaining Wall Calculator Blocks, caps, courses & drainage gravel
- Mortar Calculator Bags of mortar mix for a brick or block wall
- 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 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
- 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
- Fence Calculator Posts, rails, pickets & concrete by the run
- Siding Calculator Squares & boxes of vinyl or lap siding, with cost
- Board and Batten Calculator Even batten spacing across a wall
- 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
- 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 ways
- Feet and Inches Calculator Add, subtract & divide tape fractions to the 1/16
- How Big Is a Cubic Yard? The unit drawn to scale — coverage, loads & weight
- How Much Does a House Weigh? ≈ 50 tons — the takeoff, counted line by line
Keep the estimating cheat sheet handy — every density, bag yield, lumber size and conversion on one printable page — or browse all calculators.