Calculators/ Concrete/Curb and Gutter Calculator
Curb and Gutter Calculator
Concrete for a combined curb and gutter section.
Combined curb and gutter is poured as a single section: a vertical curb with a flat gutter pan beside it. The volume per linear foot is small, but municipal runs are long, so the cross-section has to be right before ordering.
How this is calculated
- The section is two rectangles: the curb block (height × width) plus the gutter pan (width × thickness).
- Multiply the section area by the run length for cubic feet, then divide by 27.
- A standard residential section is a 6 inch curb with an 18 to 24 inch gutter pan, though municipal standards vary and usually govern.
Frequently asked questions
What is a standard curb and gutter size?
Six inch curb height with an 18 or 24 inch gutter pan is common in US residential work. Your municipality almost certainly publishes a standard detail that overrides any rule of thumb.
How much concrete per foot of curb and gutter?
A 6 inch curb with an 18 inch pan works out at about 0.9 cubic feet per linear foot, or roughly 30 linear feet per cubic yard.
Do curbs need expansion joints?
Yes, typically every 20 feet, plus contraction joints every 10. Without them a long run cracks at random intervals instead of at the joints you chose.