Preview only: this page is never built for production. Values come from the registry running real spec examples. Offers and ad slots are samples and link nowhere.
Header
The header as built: wide here, and a wordmark with a menu button when this panel is under 640px wide. Then the open phone menu, which fills the screen on a real phone (shown inside a phone-sized frame).
The 10 x 10 ft patio example: checked (the date is a gallery sample; real cards use the tool's lastFactCheck), not yet fact-checked (what every tool shows in a preview today), added to the project list, and empty (a required size is 0).
Wood stakes·about one every 3 feet of form, our estimate·often forgotten14
Wire mesh, 5 x 10 foot sheets·optional, allow extra for overlap2
Control joints·no more than about 10 feet apart; 6-8 feet for 4 inch walks
Project-type control
Tool pages show it only when two or more tools in the group have pages. Here every tool in the group is listed, the current one raised and the others real links.
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Live slab drawing
The 10 x 10 ft patio, and with no length yet. It redraws as the inputs change and has a text alternative.
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Redraws as you type·thickness exaggeratedRedraws as you type·thickness exaggerated
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Redraws as you type·thickness exaggeratedRedraws as you type·thickness exaggerated
Article section
Rendered from the spec outline as written, with the Draft copy tag.
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How thick should a slab be?Draft copy
Quikrete 4 to 6 inches by load; walkways at least 4 inches. No invented per-use table.
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How thick should a slab be?Draft copy
Quikrete 4 to 6 inches by load; walkways at least 4 inches. No invented per-use table.
Worked examples
The spec's examples, computed by the registry.
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Worked examples
10 x 10 feet patio, 4 inches thick, 10% extra
Length 10 ft·Width 10 ft·Thickness 4 in·Extra for waste and spills 10%
Order 1.36 cubic yards: that is 62 x 80 pound bags or 82 x 60 pound bags.
Concrete to order
1.36 yd³
80 lb bags
62
60 lb bags
82
40 lb bags
123
Cubic metres
1.04 m³
Measured volume (no extra)
33.3 ft³
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Worked examples
10 x 10 feet patio, 4 inches thick, 10% extra
Length 10 ft·Width 10 ft·Thickness 4 in·Extra for waste and spills 10%
Order 1.36 cubic yards: that is 62 x 80 pound bags or 82 x 60 pound bags.
Concrete to order
1.36 yd³
80 lb bags
62
60 lb bags
82
40 lb bags
123
Cubic metres
1.04 m³
Measured volume (no extra)
33.3 ft³
Sources list
Primary sources, then sources labelled secondary and derived.
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Primary sources
Each calculator uses the standard formula and the manufacturer's own figures, such as bag yields, and rounds up where running short would cost you a trip. Every step is shown. Cost ranges come from named surveys with the date we checked them. Spot something wrong? Tell us and we will fix it and note the change.
Each calculator uses the standard formula and the manufacturer's own figures, such as bag yields, and rounds up where running short would cost you a trip. Every step is shown. Cost ranges come from named surveys with the date we checked them. Spot something wrong? Tell us and we will fix it and note the change.