Construction & Materials Calculators

Free construction calculators for concrete, gravel and mulch. Work out quantities, bag counts and cost estimates in seconds — no signup, results as you type.

Each calculator runs in your browser, so nothing is uploaded, and every cost figure is an editable estimate rather than a quote.

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  Concrete Calculatorlive

  Cubic yards, 40/60/80 lb bag counts, weight and an estimated cost for slabs, footings, columns, stairs and post holes.

  10 ft × 12 ft × 4 in = 1.48 cu yd
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  Concrete Slab Calculatorlive

  Slab-only quantities for L-shapes and multi-section pours, with sub-base gravel, rebar length, vapour barrier and form boards.

  24 ft × 24 ft × 6 in = 10.67 cu yd
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  Concrete Slab Cost Calculatorlive

  Price a slab by the square foot with a line-item breakdown for concrete, sub-base, rebar, forms and labour.

  $9.71 / sq ft · 24 × 24
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  Concrete Block Calculatorlive

  Count blocks, mortar bags, core fill and rebar for a block wall of any size, with openings subtracted.

  189 blocks · 20 × 8 ft wall
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  Concrete Bag Calculatorlive

  How many 40, 60 or 80 lb bags you need for a pour, by volume or by dimensions, with a price comparison against ready-mix.

  56 bags · 80 lb · 4 ft × 4 ft × 4 in
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  Concrete Footing Calculatorlive

  Size and price strip footings, pad footings, deck piers and trench fill, with rebar and frost depth guidance.

  2.4 yd³ · 40 ft strip footing
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  Concrete Weight Calculatorlive

  Weigh a slab, a block wall or a truckload in lb, tons and kg, with a floor load and trailer payload check.

  4 in slab = 50 lb / sq ft
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  Concrete Mix Ratio Calculatorlive

  Turn a mix ratio or strength grade into cement, sand, aggregate and water, with bag counts, cost and a per-batch recipe.

  1:2:4 = 6 bags per yd³
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  Sonotube Concrete Calculatorlive

  Concrete, bags and tube lengths for round form tubes, including how many tubes to buy and how to cut them.

  12 in × 4 ft = 3.1 cu ft
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  Gravel Calculatorcoming soon

  Tons and cubic yards of gravel for driveways, paths and drainage.
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  Mulch Calculatorcoming soon

  Cubic yards and bag counts of mulch for garden beds at any depth.
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  Pea Gravel Calculatorcoming soon

  Pea gravel quantities for walkways, play areas and pipe bedding.