Concrete Sidewalk Calculator
Estimate ready-mix volume, concrete bags, surface area, form length, placed weight and cost for one or more rectangular sidewalk sections.
Default project preview
2.17 yd³
Concrete bags
98
Surface area
160 ft²
Base volume
1.98 yd³
Form perimeter
88 ft
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Input and output guide
What each value means
The labels and units below are part of this calculator’s visible methodology. Replace every default with measurements or product data from the actual project.
Sidewalk length
Enter this project assumption in ft. The current imperial default is 40 ft.
Sidewalk width
Enter this project assumption in ft. The current imperial default is 4 ft.
Concrete thickness
Enter this project assumption in in. The current imperial default is 4 in.
Equal sidewalk sections
Enter this project assumption in a unitless value. The current imperial default is 1. Minimum: 1.
Extra allowance
Enter this project assumption in %. The current imperial default is 10 %. Minimum: 0. Maximum: 50.
Concrete yield per bag
Enter this project assumption in ft³. The current imperial default is 0.6 ft³.
Ready-mix price
Enter this project assumption in per yd³. The current imperial default is 165 per yd³. Minimum: 0.
Price per bag
Enter this project assumption in a unitless value. The current imperial default is 7. Minimum: 0.
How to read the outputs
Concrete bags
rounded full bags. Default preview: 98.
Surface area
all sections. Default preview: 160 ft².
Base volume
before allowance. Default preview: 1.98 yd³.
Form perimeter
four sides per section. Default preview: 88 ft.
Placed weight
planning density. Default preview: 8,790 lb.
Cost comparison
ready-mix / bags. Default preview: $358.52 / $686.00.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Concrete volume = length × width × thickness × section count. The allowance is applied before ready-mix conversion and full-bag rounding.
FAQ
Concrete Sidewalk Calculator questions
Should the sidewalk base be included?+
No. Aggregate base and excavation are separate from the concrete volume.
Does the calculator include control joints?+
It reports concrete quantity only. Joint spacing and details depend on the project design.
Can the thickness be changed?+
Yes. Enter the actual specified concrete thickness for the walkway.