Calculators
36 tools for the store run
Concrete, gravel, asphalt, drywall, tile, fence, deck, stairs, and shingles — browser math with waste and bag counts. Pick the material you are buying this weekend.
Estimate only — not a contractor bid. Confirm bag yields, coverage rates, and truck quotes with your supplier before you order.
Concrete
Slabs, pads, footings, blocks, and rebar — yards, bags, and steel shopping counts with waste.
7 tools
- Concrete calculatorYards and 40/60/80 lb bags for slabs, footings, and holes with waste.Open
- Concrete slab calculatorRectangular slab or patio — thickness to yards and bags.Open
- Concrete bag calculatorConvert yards or cu ft into 40/60/80 lb bag counts.Open
- How much concrete do I need?Dimensions to cubic yards and bags — shopping-list wording.Open
- Rebar calculatorGrid length, sticks, and approximate weight by bar size.Open
- Concrete block calculatorCMU counts and rough mortar bags for walls.Open
- Concrete pad calculatorEquipment and shed pads — yards and bags with waste.Open
Gravel, mulch & asphalt
Area × depth to cubic yards, optional tons, pea gravel bags, and asphalt driveway tonnage.
6 tools
- Gravel calculatorArea × depth to cubic yards and approximate tons.Open
- Mulch calculatorBed area and depth to yards and 2 cu ft bags.Open
- How many bags of mulch in a yard?Convert cubic yards of mulch to bags (and back).Open
- Topsoil calculatorArea and depth to cubic yards for beds and lawn dress.Open
- Asphalt calculatorDriveway and patch tonnage from area and thickness with waste.Open
- Pea gravel calculatorPea gravel yards, tons, and bags from area and depth with waste.Open
Paint
Room gallons after doors and windows come out — coats, coverage, optional primer.
3 tools
Roof
Pitch and slope geometry, roofing squares, shingle bundles, and $/sq ballparks — not a bid.
5 tools
- Roof pitch calculatorRise/run to X/12 pitch, degrees, and slope factor.Open
- Shingle calculatorAsphalt shingle squares and bundles from area and pitch factor.Open
- Roof slope calculatorConvert slope as ratio, degrees, or percent to a surface factor.Open
- Roofing calculatorRoofing squares from footprint and pitch factor with waste.Open
- Roof cost calculatorRough materials or ballpark total from squares × $/sq you enter.Open
Inside the house
Drywall, tile, grout, flooring, and insulation — sheets, boxes, bags, and waste.
6 tools
- Drywall calculator4×8 sheet counts plus rough mud, tape, and screws.Open
- Tile calculatorPiece and box counts from room area, tile size, and waste.Open
- Grout calculatorTile joint volume and bag counts from area, tile size, and joint width.Open
- Flooring calculatorFlooring boxes from room area, carton coverage, and waste.Open
- Insulation calculatorBatt or bag pack counts from wall/floor area and label coverage.Open
- Attic insulation calculatorBlown or batt attic bags from area and bags-per-1,000 chart.Open
Fence, deck & framing
Fence, deck, stairs, siding, lumber piece counts, board feet, and rafter lengths.
9 tools
- Stair calculatorRiser count, riser height, treads, and total run from floor-to-floor rise.Open
- Stair stringer calculatorStringer length from total rise and run, plus stock count.Open
- Fence calculatorPosts, panels or pickets, rails, and bagged concrete for holes.Open
- Deck calculatorDeck board and joist counts from size, board width, and spacing.Open
- Deck board calculatorBoard counts from cover width, face width, gap, and stock length.Open
- Siding calculatorSiding squares or panels from wall area minus openings with waste.Open
- Board foot calculatorConvert thickness, width, and length into board feet.Open
- Lumber calculatorStud and joist piece counts from run and spacing, optional board feet.Open
- Rafter calculatorCommon rafter line length from rise and run, with optional overhang.Open
How the math works: methodology. Who we are: about.