Patios & Slabs
The patio & slab cluster: concrete patio cost, concrete slab cost, garage / shed slab cost (with a thickened-edge line), a slab-on-grade thickness reference by use, and patio cost per sq ft with a labeled band. A garage slab here is concrete flatwork volume and cost only — joist span and floor load are for a qualified builder and local code.
Planning estimate: this is a planning estimate from the numbers you enter — not a bid or a contract. Concrete pricing depends on mix, thickness, site access, sub-base prep, finish and local labor. Get itemized written quotes from licensed, insured concrete contractors before you commit.
Concrete patio costEstimate concrete patio cost from area, your $/sq ft, sub-base and add-ons, with a contingency buffer. Free calculator with formula, worked example and FAQ.Concrete slab costEstimate concrete slab cost from area, your $/sq ft, sub-base and rebar, plus a contingency buffer. Free calculator with formula, worked example and FAQ.Garage / shed slab costEstimate garage or shed slab cost from area, your $/sq ft, thickened edge and add-ons, plus contingency. Free calculator with formula, worked example and FAQ.Slab-on-grade thickness referenceTypical slab-on-grade thickness by use: 4 in residential, 4-5 in garage, 5-6 in driveway, plus rebar/mesh typicals. Labeled planning values, not a design.Patio cost per sq ftMultiply patio area by your price per square foot for a quick total, checked against the typical $6-16/sq ft band. Free calculator with formula and FAQ.
Every Patios & Slabs tool is calculated server-side — visible immediately — with its formula, a worked example and a reference table, and works on the quantities you measure and the prices you enter from your own quotes. Background reading is in the guides.