Curb & Gutter Concrete Volume Calculator (Imperial Units)
This curb-and-gutter calculator determines the cross-sectional area and concrete volume for straight curb runs. Results appear in cubic feet, cubic yards, and cubic metres, while a running total tracks multiple sections so material orders cover the whole job.
Using metric measurements? Switch to the Curb and Gutter Calculator - Metric.
Other useful imperial concrete tools:
Concrete Curb & Gutter Calculator
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Running Total of Concrete |
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Reset Form: clears current inputs and results but keeps the totals. Reset Totals: zeros the cumulative totals. |
Calculator
- the horizontal run of the curb section in feet
- thickness of the curb measured from the face to the back edge in inches
- vertical height of the curb above the gutter slab in inches
- the horizontal width of the gutter beyond the curb in inches
- thickness of the gutter slab (flag thickness) in inches
Results
- the cross-sectional area of the curb face and slab in square feet
- the volume of concrete needed in cubic feet
- the volume in cubic yards
- the volume in cubic metres
Concrete Curb & Gutter Volume Calculator - Math Formulas
This calculator estimates concrete volume by computing the total cross-sectional area of a curb and gutter and multiplying by length.
1. Cross-Sectional Area Formula
The total cross-sectional area is calculated by summing the curb face and flag (slab) areas: \[ A_{\text{total}} = A_{\text{curb}} + A_{\text{flag}} = (d \cdot h) + ((d + g) \cdot t) \]
- \( d \) = Curb Depth (ft)
- \( h \) = Curb Height (ft)
- \( g \) = Gutter Width (ft)
- \( t \) = Flag Thickness (ft)
2. Volume Formula
Multiply the cross-sectional area by the run length to find volume in cubic feet: \[ V_{\text{ft}^3} = A_{\text{total}} \cdot L \]
3. Unit Conversions
Convert the result to cubic yards and cubic metres: \[ V_{\text{yd}^3} = \frac{V_{\text{ft}^3}}{27}, \qquad V_{\text{m}^3} = V_{\text{ft}^3} \cdot 0.0283168466 \]
Example Calculation
Given the following input dimensions:
- Curb Depth = 6 inches → \( d = \frac{6}{12} = 0.5 \, \text{ft} \)
- Curb Height = 5 inches → \( h = \frac{5}{12} = 0.4167 \, \text{ft} \)
- Gutter Width = 12 inches → \( g = \frac{12}{12} = 1.0 \, \text{ft} \)
- Flag Thickness = 3 inches → \( t = \frac{3}{12} = 0.25 \, \text{ft} \)
- Length = 100 ft → \( L = 100 \, \text{ft} \)
Step 1: Calculate Cross-Sectional Area
\[ A_{\text{curb}} = d \cdot h = 0.5 \cdot 0.4167 = 0.2083 \, \text{ft}^2 \] \[ A_{\text{flag}} = (d + g) \cdot t = (0.5 + 1.0) \cdot 0.25 = 1.5 \cdot 0.25 = 0.3750 \, \text{ft}^2 \] \[ A_{\text{total}} = 0.2083 + 0.3750 = 0.5833 \, \text{ft}^2 \]Step 2: Calculate Volume
\[ V_{\text{ft}^3} = 0.5833 \cdot 100 = 58.33 \, \text{ft}^3 \] \[ V_{\text{yd}^3} = \frac{58.33}{27} \approx 2.16 \, \text{yd}^3 \] \[ V_{\text{m}^3} = 58.33 \cdot 0.0283168466 \approx 1.652 \, \text{m}^3 \]Point-Form Summary
- Cross-sectional area: 0.5833 ft²
- Volume in cubic feet: 58.33 ft³
- Volume in cubic yards: 2.16 yd³
- Volume in cubic metres: 1.652 m³
The tool streamlines concrete estimates for roadways, parking lots, and municipal gutter work, helping crews order the right material for the first time.