Concrete Curb Calculator

Why This One Is Different

You've got a landscape edge, a wheel stop, or a driveway curb to pour, and the shape makes the concrete math almost embarrassingly simple compared to a slab. This calculator multiplies your curb's height and width in feet to get cross-sectional area, multiplies that by total length for plan volume, and then layers on the standard ordering allowance for spillage and form irregularity. Landscape edging, parking-lot wheel stops, and driveway curbs all share the same basic shape: a small, consistent cross-section repeated down a run of length. A 6×6-inch curb run 100 feet long works out to about 0.93 cubic yards of plan volume before the allowance is added.

Where the Numbers Come From

• A curb run is just its cross-section repeated down the length, so the volume math is exact, no estimation involved: curb volume = cross-sectional area (height × width) × run length. Source: worked example (closed-form geometry)
• A 6×6-inch curb run 100 feet long works out to 25 cubic feet, or about 0.93 cubic yards of plan volume, before any ordering allowance. Source: worked example (closed-form geometry)
• Order 4-10% more concrete than your curb's plan volume calls for: NRMCA guidance sets that allowance for any formed pour, and a linear curb run is no exception. Source: NRMCA, CIP 8: Discrepancies in Yield (2021 reprint)