Concrete Curb & Gutter Calculator — ft, yd³
How to use this calculator
Choose a curb profile type — barrier (vertical face), mountable/rollover (sloped), or straight curb with gutter pan. Enter total run length, curb and gutter dimensions, and waste allowance. The SVG shows the cross-section profile.
Cost — ready-mix per yd³, 80-lb bags, or 60-lb bags.
Reinforcement — continuous longitudinal bars (#4 or #5) running the full curb length per ACI, plus optional dowels at expansion joints.
Labor — rate per linear foot, per yd³, or flat price.
Saved Calculations
| Time | Profile | Length | Vol yd³ | Cost | Rebar | Labor | Total |
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How to Calculate Concrete for Curb and Gutter
This calculator estimates concrete volume for three common curb and gutter profiles: barrier (vertical face), mountable/rollover (sloped face for vehicle crossing), and straight curb with gutter pan. Enter run length, curb height (typically 6″), curb width (6″), gutter pan width (12–24″), and gutter thickness (4–6″). The cross-section area is calculated from the profile geometry, then multiplied by the run length.
Formulas
Barrier curb: Area = Curb Height × Curb Width + Gutter Width × Gutter Thickness.
Mountable: Area = ½ × Curb Height × Curb Width + Gutter Width × Gutter Thickness (triangular curb face).
Straight: Area = (Curb Height + Gutter Thickness) × Curb Width + Gutter Width × Gutter Thickness.
Volume = Area × Length × (1 + Waste%).
Reinforcement
Continuous longitudinal bars (#4 or #5) run the full length of the curb for crack control. Lap splices at 40 bar diameters per ACI 318. Expansion joints every 20–30 ft with dowels.
