How much concrete for a 10x12 patio?
A 10x12 ft patio slab at standard 4-inch depth needs about 74 bags of 80lb premix or 1.6 cubic yards of ready-mix concrete (with 10% waste factor). The calculator below is pre-filled for this project.
Material Totals
1 cu yd = 27 cu ft. One 80lb bag covers ~0.6 cu ft; one 60lb bag ~0.45 cu ft. For pours over ~1 cu yd, ready-mix delivery is usually more economical.
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Generated by BuildTotals.com | 6/13/2026 | buildtotals.com/tools/concrete-calculator
Estimates include 10% waste factor. Confirm with your supplier before purchasing.
Step-by-step for a 10x12 patio slab
A 10x12 patio (120 sq ft) is a manageable DIY project. Plan for 2-3 people and a full weekend. You will need forms (2x4 lumber), rebar or wire mesh, a rented mixer or wheelbarrow, a screed board, and a float.
At 74 bags of 80lb premix, this is on the borderline where ordering ready-mix starts to make sense economically. Get a quote from a local supplier - a minimum delivery is often 1-2 yards and may be priced similarly to buying bags.
Open the full concrete calculator to adjust depth or add a waste factor.