BuildToolsHub US Construction Calculators

Asphalt & Paving

Curb Concrete Calculator

Estimate concrete for extruded or formed curbs.

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Educational US estimate only. Not engineering, structural, code, or professional construction advice. Mix designs, codes, and local conditions vary — verify with licensed professionals and your building department.

Estimator methodology

BuildToolsHub takeoffs separate net measured quantities from ordered quantities. Ordered qty = net × condition-based waste, then rounded for plant or package sizes (e.g. ready-mix to the nearest 0.5 yd³).

  • Concrete bags: Quikrete / SAKRETE published yields (80 lb ≈ 0.60 ft³). Ready-mix contingencies follow ASTM C94 purchaser practice.
  • Rebar: CRSI published lb/ft tables; optional lap allowance ≈ 40× bar diameter (confirm with drawings).
  • Roofing: NRCA squares (100 ft²); pitch factor √(1+(rise/12)²); ~3 bundles/square for standard shingles.
  • Aggregates / fill: ASTM C29-style densities; swell/compaction allowances for haul and place volumes.
  • Masonry: BIA / NCMA common unit factors (e.g. ~1.125 CMU/ft² for 8×16 face).

Use the Order tab for a supplier call sheet and the Assumptions panel for the exact factors applied to this run.

Why use Curb Concrete Calculator

Calculate curb concrete volume using total length and typical curb cross-section dimensions.

Extruded curb machines have specific section templates—match your profile.

How to use

  1. Enter job dimensions. Pick a pour/layout condition to set industry waste %, or choose Custom.
  2. Review Net vs Order on the Summary tab — order the rounded quantity, not net alone.
  3. Open the Order tab for a supplier checklist, then print, export CSV, or share the link.

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About Curb Concrete Calculator

How do I get cross-section area?

Multiply curb height and average width, or use the standard profile area.

Include gutter pans?

Curb-and-gutter sections are larger—use the full section area.

Rebar in curbs?

Sometimes specified—calculate steel separately.

Is this professional engineering advice?

No. Educational estimates only. Verify with a licensed professional and local codes.

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