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Patio Cost Calculator

Estimate patio cost — material, quantity and price with waste. Compare per yard, per bag or per ton for US projects. Enter dimensions, select units and add waste to get instant, supplier-ready numbers.

1. Measurements & Dimensions

2. Material Properties & Waste Allowance

3. Optional Material Cost

PATIO COST CALCULATOR ESTIMATE
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Enter dimensions above to calculate

Calculation Breakdown & StepsFormula: Total = quantity × allowance factor × unit price × (1 + material tax / 100) + delivery + labor.
  1. Enter values to see step-by-step substitution.

    Engineering Assumptions:

    • Quantity and quoted unit price must use the same unit. Tax applies to materials only in this model; local treatment of services and delivery may differ.
    • Use a separate calculation for each material line and add the totals.
    VISUAL GUIDE — PATIO COST CALCULATORslab · patio-cost-calculator

    TOP VIEW — Material quantity × Material price (optional)

    Patio Cost Calculator topMaterial quantity 20ftMaterial price (optional)Patio Cost20×12 = 240 ft²

    SECTION — Delivery charge ($) 8in

    Patio Cost Calculator sectionPatio Cost 8in8"Total = quantity × allowance factor × unit price × (1 + material tax / 100) + delivery + labor. · +10% → 6.52 yd³
    Patio Cost Calculator — Total = quantity × allowance factor × unit price × (1 + material tax / 100) + delivery + labor. · example 20×12 @8in = 160.0 ft³ (5.93 yd³) → 6.52 yd³ with 10% waste · patio-cost-calculator

    What Is This Calculator?

    The Patio Cost Calculator — Sizes slabs and patio concrete for US patios and shed pads — area, thickness, reinforcement and cost.

    What Does It Calculate?

    • Slab area in square feet
    • Concrete volume in cubic yards
    • Bags and reinforcement with waste

    How to Use the Calculator

    1. Measure Patio 12x10 ft x 4 in, $150/yd3 + $100 delivery — use feet for length/width and inches for thickness where typical.
    2. Enter values and select units. The calculator converts to feet before calculating (inches /12, yards x3).
    3. Adjust waste % and optional price, then click Calculate. Results show with waste included.
    4. Use Reset to clear and try another size.

    Formula & Engineering Methodology

    Total = quantity × allowance factor × unit price × (1 + material tax / 100) + delivery + labor.

    • Volume — Cubic yards with waste
    • Price — $ per yd3

    All units convert to exact standard engineering dimensions (NIST SP 811) before calculation to ensure consistency between US Customary and Metric measurements.

    Worked Example

    Example: Patio 12x10 ft x 4 in, $150/yd3 + $100 delivery

    STEPVALUE
    Volume1.48 yd3 +10% = 1.63 yd3
    Material1.63*150 = $244.50
    Total$244.50+100 = $344.50

    Construction Information

    Material: Patio slabs 3.5–4 in thick, 3000–3500 psi. Base 4 in compacted gravel. Use welded wire mesh or rebar for crack control.

    Cost varies $140-180/yd3 + delivery. Bags vs truck break-even ~1 yd3.

    Material Information

    Patio slabs 3.5–4 in thick, 3000–3500 psi. Base 4 in compacted gravel. Use welded wire mesh or rebar for crack control.

    Waste & Overages

    Add 5–10% for spillage and thickness variation — 10% safe for hand-screeded patios.

    Practical Tips

    • Slope patio 1/4 in per foot away from house
    • Keep joints every 8–10 ft to control cracking

    Common Mistakes

    • Pouring too thin (under 3.5 in) — cracks and frost heave
    • Forgetting slope — water pools against house

    Assumptions & Engineering References

    • Quantity and quoted unit price must use the same unit. Tax applies to materials only in this model; local treatment of services and delivery may differ.
    • Use a separate calculation for each material line and add the totals.

    This calculator provides an estimate based on your inputs. Actual requirements vary by site, material and installation. For code-regulated or load-bearing work, consult a qualified professional.

    Calculations run 100% in your browser — zero tracking of your dimensions or input data.

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    Frequently asked questions

    What does the Patio Cost Calculator calculate?

    The Patio Cost Calculator estimates patio cost quantity for US jobs — Slab area in square feet, Concrete volume in cubic yards, Bags and reinforcement with waste. Enter dimensions, choose units, add waste and price to get instant results.

    How do I measure for patio cost?

    Measure patio 12x10 ft x 4 in, $150/yd3 + $100 delivery on site. Use the unit selectors — the tool converts inches→feet (÷12) and yards→feet (×3) before math. For non-rectangular, split into rectangles and add.

    How much waste should I add?

    Add 5–10% for spillage and thickness variation — 10% safe for hand-screeded patios.

    How accurate is this patio cost estimate?

    Math is exact for your inputs. Actual needs vary by site, material and installation. Add 5–10% waste for rectangular, 10–15% for irregular.

    About Calculator Street

    Built by Vipul Otari for US homeowners & contractors. Calculator inputs are processed in your browser. Estimates depend on your measurements, product specifications and the assumptions shown on this page. Confirm order quantities with your supplier and structural requirements with your project designer. Page updated: 2026-09-11.

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