Figure out exactly what to buy for your build
Free construction material calculators that finish the job: not just a volume, but the exact bags, boxes, sheets and gallons to buy, waste included, with a list you can print and take to the store.
Calculator categories
Concrete
Bags, slabs, volume, block, rebar and post holes.
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Flooring & Tile
Tile, grout, flooring and carpet quantities.
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Walls & Paint
Paint, brick, drywall, wallpaper and insulation.
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Outdoor
Gravel, mulch, sand, pavers, fencing and decks.
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Lumber
Board feet, stud framing and stair stringers.
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Roofing
Shingle bundles and roof squares.
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Popular calculators
Concrete Bag Calculator
How many 40, 60 or 80 lb bags of concrete you need, and what they'll cost.
Concrete Slab Calculator
Cubic yards of ready-mix for a slab, plus the bag count if you mix it yourself.
Concrete Volume Calculator
Cubic yards and cubic feet for any pour shape.
Concrete Block (CMU) Calculator
Blocks and mortar bags for a block wall.
Rebar Calculator
Rebar pieces and grid layout for a slab.
Post Hole Concrete Calculator
Bags per post hole or sonotube footing.
Tile Calculator
Tiles and boxes to buy, with grout-gap spacing and cutting waste included.
Grout Calculator
Pounds and bags of grout by tile size and joint width.
Flooring Calculator
Boxes of laminate or vinyl plank for your room.
Carpet Calculator
Square yards of carpet, allowing for roll width.
Paint Calculator
Gallons and quarts for a room, with doors, windows and coats accounted for.
Brick Calculator
Bricks and mortar bags for a wall, by brick size.
Drywall Calculator
Sheets, mud and tape for walls and ceilings.
Wallpaper Calculator
Rolls to buy, allowing for pattern repeat.
Insulation Calculator
Batts and bags for walls and attics.
Gravel Calculator
Tons and cubic yards for driveways and paths.
Mulch Calculator
Bags or cubic yards of mulch by bed area and depth.
Topsoil Calculator
Cubic yards and bags of topsoil for lawns, beds and levelling.
Sand Calculator
Tons of sand for paver base, pools and sandboxes.
Paver Calculator
Pavers, base gravel and bedding sand for a patio.
Fence Calculator
Posts, rails and pickets for a wood fence.
Deck Calculator
Deck boards and fasteners for your deck size.
Board Foot Calculator
Board feet from lumber dimensions, plus cost.
Stud Framing Calculator
Studs and plates for a framed wall.
Stair Calculator
Steps, rise, run and stringer length.
Roofing Shingle Calculator
Shingle bundles and squares for your roof.
How Figure My Build works
1
Measure your job
Enter the real dimensions of a slab, a room, a wall. Feet or metres, inches or centimetres.
2
Get the buy-list
Whole bags, boxes and gallons, with waste allowance and an estimated cost, using manufacturer yield figures.
3
Print it, buy once
Take the list to the store and buy the job in one trip. No mid-project run for two more bags.
Buying guides
The reasoning behind the numbers: yields, allowances and conversions, from the same sources as the calculators.
How Many Bags of Concrete Do I Need?
Bag yields, a worked slab, and when ready-mix beats bags.
Waste Allowances: How Much Extra to Order
The planning percentages, material by material.
How to Measure a Room
One set of measurements for flooring, carpet, paint and drywall.
Bags vs Bulk
Bags per yard, yard weights, and the 3-yard crossover.