Curb and Gutter Calculator
Calculate concrete volume needed for a curb-and-gutter run from its length and cross-section area.
How this calculator works
A curb-and-gutter run has a constant cross-section shape along its whole length, so the concrete volume needed is just that cross-section’s area multiplied by how far the run extends. Once you know the area of the curb-and-gutter profile you’re pouring, the rest is a straightforward multiplication.
Formula: Concrete volume = run length × the curb-and-gutter cross-section’s area. A standard combined curb-and-gutter profile is commonly around 1.5 sq ft in cross-section — check your specific curb profile’s spec sheet or drawing for the exact figure.
Worked example
A 200 ft curb-and-gutter run, with a 1.5 sq ft cross-section:
- Volume = 200 × 1.5 = 300 ft³
- Converted to cubic yards: 300 ÷ 27 = 11.11 yd³
Notes
Curb-and-gutter cross-section area varies by profile. Rolled curb, vertical curb, mountable curb, and gutter pan width all differ from one standard detail to the next, so don’t assume 1.5 sq ft applies to your job beyond a rough estimate.
Municipal standard details typically specify the exact profile dimensions for the curb-and-gutter type required on a given project. Pulling the cross-section area from that standard detail, rather than guessing, keeps your volume estimate close to what actually gets poured.
How to use
Enter your curb-and-gutter run’s total length and the cross-section area for your specific profile, and the calculator multiplies the two to return the concrete volume needed. Use the resulting cubic yard figure when placing your ready-mix order, and confirm the cross-section area against your project drawings first.
A simplified volume estimate. Your specific curb-and-gutter profile’s exact cross-section area should come from your municipal standard detail or project drawings.
Frequently asked questions
What cross-section area should I use for a standard curb-and-gutter run?
A commonly used combined curb-and-gutter profile runs around 1.5 sq ft in cross-section, but this varies by design. Check your specific curb profile's spec sheet or project drawing for the exact cross-section area before ordering concrete, since using the wrong figure throws off the whole volume estimate.
Why does curb-and-gutter cross-section area vary so much?
Curb-and-gutter is poured to a municipal or project-specific standard detail, and those details differ in curb face height, gutter pan width, and overall profile shape. Rolled curb, vertical curb, and mountable curb all carry different cross-section areas, so a figure that's correct for one town's standard can be wrong for another's.
Where do I find the exact cross-section area for my curb-and-gutter profile?
Your municipality's standard detail drawings are the most reliable source, since they specify the exact profile dimensions used for public roadway work. If you're working on a private project, your project's civil drawings or the concrete contractor's spec sheet should list the cross-section area for the profile being poured.
Does this calculator account for waste or overpour?
No, this calculator returns the raw volume based on run length and cross-section area only. Concrete crews commonly order a bit extra to cover minor grade variation, formwork loss, and spillage, so check with your ready-mix supplier or contractor about a reasonable overage percentage for your job.
Estimates only. Verify quantities with your supplier before purchasing.