Home Project Calculators
Material quantities for concrete, decks, fences, roofing, paint, flooring, drywall and insulation — measured the way suppliers sell them, with waste allowances you control.
Most used
- Concrete Bag CalculatorConvert a known concrete volume into 40, 50, 60 and 80 lb bags.
- Concrete Slab CalculatorCubic yards, bags and cost for slabs, patios, driveways, sidewalks and pads.
- Deck Board CalculatorDeck boards, linear feet and deck screws for a rectangular deck.
- Fence Calculator (Posts, Rails & Pickets)Posts, rails, pickets and post-hole concrete for a wood board fence.
- Flooring CalculatorSquare feet and boxes of hardwood, laminate or vinyl plank for one or more rooms.
- Paint CalculatorGallons of wall, ceiling and primer paint for one or more rooms.
- Roofing Calculator (Squares, Shingles & Drip Edge)Roof area, squares, shingle bundles, underlayment, ridge cap and drip edge from footprint and pitch.
- Cubic Yard CalculatorCubic yards, cubic feet and cubic meters for one or more areas at a depth, with weight in tons and truckloads.
- Square Footage CalculatorTotal square feet, square yards and square meters for rooms and areas of any common shape, with optional cost.
Concrete
- Concrete Bag CalculatorConvert a known concrete volume into 40, 50, 60 and 80 lb bags.
- Concrete Footing CalculatorConcrete for continuous (strip) footings and curbs by linear foot.
- Concrete Post Hole & Column CalculatorConcrete bags for fence post holes, deck piers and round columns (sonotubes).
- Concrete Slab CalculatorCubic yards, bags and cost for slabs, patios, driveways, sidewalks and pads.
- Concrete Steps CalculatorConcrete volume for a solid set of poured steps with an optional top landing.
- Cubic Yard CalculatorCubic yards, cubic feet and cubic meters for one or more areas at a depth, with weight in tons and truckloads.
- Rebar Calculator for SlabsRebar grid for a concrete slab: bars each way, linear feet with lap splices, stock bars to buy, weight and chairs.
Masonry
Deck
- Deck Board CalculatorDeck boards, linear feet and deck screws for a rectangular deck.
- Deck Footing & Post CalculatorNumber of deck posts and footings, and concrete for round footings.
- Deck Joist CalculatorNumber of joists, joist hangers and rim board length for a deck frame.
- Deck Railing & Baluster CalculatorRailing posts and balusters with the 4-inch sphere rule.
- Stair & Stringer CalculatorRisers, riser height, treads, total run and stringer length from total rise.
Fence
Roofing
- Roof Pitch CalculatorRoof pitch, angle, slope factor and percent grade from rise and run.
- Roofing Calculator (Squares, Shingles & Drip Edge)Roof area, squares, shingle bundles, underlayment, ridge cap and drip edge from footprint and pitch.
- Rafter Length Calculator (Common Rafters)Common rafter length with ridge reduction and overhang, plumb cut angle, birdsmouth size and rafter count.
Siding
Paint
Flooring
- Carpet CalculatorCarpet off a 12, 13.5 or 15 ft roll for each room, in linear feet and square yards.
- Flooring CalculatorSquare feet and boxes of hardwood, laminate or vinyl plank for one or more rooms.
- Tile CalculatorNumber of floor or wall tiles and boxes, accounting for grout joints.
- Square Footage CalculatorTotal square feet, square yards and square meters for rooms and areas of any common shape, with optional cost.
- Epoxy Resin CalculatorHow much epoxy to mix for a table top, river table, round pour or floor coating, split into resin and hardener, with the number of pour layers.
Drywall
Insulation
Lumber
Guides
Questions
How much waste should I add to material orders?
It depends on the material and layout: roughly 5–10% for concrete, flooring and decking on straight layouts, and 10–15% or more for roofing, diagonal patterns and complex shapes. Each calculator lets you set it.
Do these calculators check building code?
No. They estimate quantities. Structural sizes, spans, footing depths and fastening are set by your adopted code and plans.