Calculate concrete volume for curb and gutter installations. Enter cross-section dimensions and linear footage to get cubic yards.
Curb and gutter systems manage stormwater runoff while defining road edges, parking lots, and driveways. Whether you're installing barrier curbs for a street project, rolled curbs for a residential development, or mountable curbs for a commercial parking lot, you need an accurate concrete volume estimate before placing your order.
This calculator takes the cross-section dimensions of your curb and gutter profile and multiplies by the total linear footage to compute the volume in cubic yards. Different curb profiles — barrier, rolled, and mountable — have different cross-sectional areas, and this tool accounts for the most common configurations.
Curb and gutter work is typically performed by specialized contractors using curb machines (slipform extruders) or manual forms. Either way, you need to know the total volume to schedule your concrete delivery.
This measurement supports better project estimation, enabling contractors and engineers to deliver accurate bids and avoid costly overruns during the construction process.
Curb and gutter profiles have irregular cross-sections that make manual volume calculation error-prone. This calculator breaks the profile into simple geometric shapes, computes the total cross-sectional area, and multiplies by your linear footage for a reliable volume estimate. Accurate figures enable contractors to prepare competitive bids with confidence, reducing the risk of underestimating costs or overcommitting on project timelines and deliverables.
Curb area = Curb height × Curb width Gutter area = Gutter width × Gutter thickness Total cross-section = (Curb area + Gutter area) / 144 Volume (ft³) = Cross-section (ft²) × Length (ft) Cubic yards = Volume ÷ 27
Result: 3.89 cubic yards
Curb cross-section: 6 × 6 = 36 in². Gutter cross-section: 18 × 6 = 108 in². Total = 144 in² = 1.0 ft². At 200 linear feet: 200 ft³ = 7.41 yd³. With 5% waste: 7.78 yd³.
Barrier curbs have a vertical or near-vertical face and are 6–8 inches tall. They prevent vehicles from leaving the roadway. Rolled curbs have a rounded profile that vehicles can mount at low speed, common in residential areas. Mountable curbs are low-profile (4 inches) and allow vehicle crossings.
Slipform curb machines extrude concrete in a continuous operation, placing 200–500 LF per day. This is efficient for long runs. Hand-formed curbs use lumber or metal forms and are practical for short runs, curves, and speciality profiles.
Most municipalities have standard curb and gutter details in their construction standards. Always verify the required profile, concrete strength, air entrainment, and joint spacing with the local jurisdiction before ordering materials.
A standard 6-inch barrier curb with 18-inch gutter pan uses about 1.0 ft³ per linear foot (curb: 0.25 ft³ + gutter: 0.75 ft³). This equates to roughly 0.037 cubic yards per linear foot.
Barrier curbs (vertical face) are used on streets and highways. Rolled curbs are common in residential subdivisions where driveway access is needed. Mountable curbs allow vehicles to drive over them and are used in parking lots and medians.
Curb and gutter typically uses 3,000–3,500 PSI air-entrained concrete. The air entrainment (5–7%) is critical for freeze-thaw durability since curbs are constantly exposed to moisture and deicing chemicals.
Slipformed curb concrete sets quickly — the curb machine extrudes concrete that must hold its shape immediately. Typical set time is 4–6 hours before the curb can resist light contact, with full cure at 28 days.
Standard residential curb and gutter often uses no rebar or just a single #4 bar for continuity. Commercial and highway curbs may require #4 bars at 12–18 inch centers. Check your project specifications.
Control joints (tooled or sawed) are placed every 10 feet in straight runs and at tangent points of curves. Expansion joints are placed at structure connections and every 100–200 feet.