Concrete for a Patio Slab

Measure the actual pour

Record the length and width of the area that will contain concrete. An adjacent path, step or existing section is not part of that rectangle unless you include it deliberately. Split a changing outline into non-overlapping rectangular sections.

Enter the depth already selected for the project. PackLedge does not decide a patio’s thickness, reinforcement or foundation. The diagram describes the quantity model and should not be treated as a construction drawing.

Follow a complete example

An illustrative 3 m by 2 m rectangle at a user-selected 0.1 m depth contains 0.6 m³. A chosen 10% allowance adds 0.06 m³, making 0.66 m³ the required volume.

Turn the volume into a purchase

If the selected product has a user-entered mixed yield of 0.012 m³ per bag, the example requires exactly 55 bags. That yield is an illustrative input, not a default for a named product. Copy the actual yield from the material you intend to use.

A bulk order can retain the required volume instead. Confirm the supplier’s minimum quantity or order increment separately; the calculator does not know a local supplier’s terms.

Check the plan before saving

Name the area clearly, then review each dimension and its unit. Keep any separate patio sections with their own measurements. If you later change the depth, recalculate the volume before relying on the saved purchasing quantity.

• Exclude existing surfaces that are not being filled.
• Apply the allowance once.
• Keep the product yield with the bag count.

Frequently asked questions

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