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/// Concrete & masonry · concrete for a sidewalk

Concrete Sidewalk Volume: Calculate Yards and Bags

Calculate sidewalk concrete from segments, width, depth, curves, and the selected ready-mix or bag yield.

By ProjectQty Editorial TeamReviewed Aug 9, 2026Calculator: Concrete

/// Short answer

concrete for a sidewalk — the planning answer

To estimate concrete for a sidewalk, divide the route into measurable rectangles or other simple shapes, multiply each area by its specified depth, and add the section volumes. Convert cubic feet to cubic yards or divide by the exact bag yield, then keep any allowance visible. Curves, steps, ramps, thickened edges, and transitions should be measured as separate sections rather than hidden in one average width.

How do you estimate concrete for a sidewalk?

To estimate concrete for a sidewalk, divide the route into measurable rectangles or other simple shapes, multiply each area by its specified depth, and add the section volumes. Convert cubic feet to cubic yards or divide by the exact bag yield, then keep any allowance visible. Curves, steps, ramps, thickened edges, and transitions should be measured as separate sections rather than hidden in one average width.

Sidewalk volume = sum of segment area × depth. For a rectangular segment, area = length × width; cubic yards = cubic feet ÷ 27.

/// Continue with the numbers

Run the concrete calculator

Use this concrete calculator to enter each rectangular or circular pour separately, calculate net cubic feet and cubic yards, then apply a visible project-specific waste allowance. Optional 40, 50, 60, or 80 lb bag counts use only the selected QUIKRETE Concrete Mix No. 1101 yield and round up at the final package step.

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/// Keep the topic connected

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Use the neighboring tools to keep each material, layer, and order assumption visible instead of hiding it inside one estimate.

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What should you measure first?

Walk the route and mark changes in width, grade, thickness, and construction joint. A long sidewalk often contains more than one geometry even when it looks continuous in a plan view.

  • Measure each straight segment and widened landing.
  • Record changes in width, depth, ramps, and steps.
  • Confirm whether the supplier sells by yard, bag, or minimum truckload.

What should you verify before ordering?

This estimate is for quantity planning. Verify accessible slopes, drainage, reinforcement, joints, subgrade, curing, and local requirements with the project reviewer.

  • Check the route against the drawing or field sketch.
  • Use exact product yield for bagged concrete.
  • Ask how the supplier handles small-load delivery and overage.

/// Continue the workflow

Related ProjectQty pages

/// Field-ready worksheet

Download the measurement checklist

Use the worksheet to record dimensions, product-label values, and verification notes locally. ProjectQty does not receive or store your project inputs.

/// Evidence trail

Sources and assumptions

This article inherits the calculator's declared source scope. Product yields, coverage, density, and label rates should be replaced with the exact product selected for the job.

National Institute of Standards and Technology · Primary evidenceNIST Guide to the SI, Appendix B: Conversion Factors

Exact international-foot to meter conversion; U.S. survey-foot conversion is explicitly outside this claim.

NOAA National Geodetic Survey · Prequalified fallbackThe DSDATA Format, Appendix D: U.S. Survey Foot vs International Foot

Independent confirmation that one international foot equals exactly 0.3048 meters; U.S. survey-foot conversion remains distinct.

The QUIKRETE Companies, LLC · Primary evidenceQUIKRETE Concrete Mix No. 1101-40 product yield

Approximate 0.3 ft³ yield for the 40 lb QUIKRETE Concrete Mix No. 1101-40 package only; not a generic bag-yield assumption.

The QUIKRETE Companies, LLC · Primary evidenceQUIKRETE Concrete Mix No. 1101-50 product yield

Approximate 0.375 ft³ yield for the 50 lb QUIKRETE Concrete Mix No. 1101-50 package only; not a generic bag-yield assumption.

The QUIKRETE Companies, LLC · Primary evidenceQUIKRETE Concrete Mix No. 1101-60 product yield

Approximate 0.45 ft³ yield for the 60 lb QUIKRETE Concrete Mix No. 1101-60 package only; not a generic bag-yield assumption.

The QUIKRETE Companies, LLC · Primary evidenceQUIKRETE Concrete Mix No. 1101-80 product yield

Approximate 0.6 ft³ yield for the 80 lb QUIKRETE Concrete Mix No. 1101-80 package only; not a generic bag-yield assumption.

/// Common questions

Concrete Sidewalk Volume: Calculate Yards and Bags FAQ

How do I calculate concrete for a curved sidewalk?

Approximate the curve with measured sections or a documented geometric shape, then calculate each section separately. Significant changes should not be hidden by an unverified average.

Do sidewalk steps use the same depth as the walkway?

Not necessarily. Treads, risers, landings, and thickened sections may have different geometry and should be entered as separate quantities.

How do I turn sidewalk volume into bags?

Convert the volume to the unit used by the selected product and divide by its published yield. Round up to whole bags after checking the label.