Concrete patio calculator
Estimate materials for your concrete patio.
Enter your patio's length and width to get concrete volume, a compacted gravel base estimate, and total cost — everything you need before you call a supplier or load the truck.
Enter your dimensions
National average is $150–$200 per cubic yard, delivered — edit it to match your local supplier.
Results
- Volume needed
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- Recommended order
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- Gravel base (4″)
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- Estimated cost
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Bagged mix alternative
- 40 lb bags—
- 60 lb bags—
- 80 lb bags—
Bag counts include your waste % and round up to whole bags.
Estimates only — confirm final quantities and local code requirements with your supplier or contractor.
Beyond the concrete
A patio needs more than one number.
A real patio estimate accounts for the compacted gravel base beneath the slab, not just the concrete on top. We calculate both from the same length and width, using a standard 4-inch base depth — adjust your inputs if your soil or code calls for something deeper.
FAQ
Common questions
How thick should a concrete patio be?
4 inches is standard for a patio that only carries foot traffic and outdoor furniture. If it needs to support a vehicle (parking pad) or a hot tub, go to 5–6 inches and check your local code.
Do I need a gravel base under a patio?
Yes — a compacted gravel base (typically 4 inches) improves drainage and reduces cracking from ground movement. The calculator above includes a gravel base estimate alongside the concrete volume.
Do I need rebar or wire mesh in a patio slab?
For a standard 4-inch patio on well-compacted soil, fiber-reinforced concrete or 6×6 welded wire mesh is common practice. Rebar is typically reserved for thicker slabs, poor soil, or slabs expected to bear more load — check local code if you're unsure.
How much does a concrete patio cost?
Materials alone (ready-mix concrete plus gravel base) for an average 200 sq ft patio at 4 inches thick typically run several hundred to just over a thousand dollars, before labor, forms, or finishing. Enter your dimensions above for a materials estimate specific to your patio.
Building something else?