Concrete Calculator for Sidewalks
Estimate concrete for a sidewalk or walkway slab.
Sidewalks and walkways are poured about 4 inches thick. For long narrow runs, the Rectangle shape works well. The calculator starts at 4 inches and gives cubic yards plus 80 lb bag counts.
Concrete Calculator
Estimate how much you need — and the cost.
- cubic feet 33.33
- cubic meters 0.944
- tons (US) 2.5
- tonnes 2.27
Tip: Add control joints every 4–5 feet on a walkway so cracks form neatly along the joints instead of randomly.
How it's calculated
1 cubic yard = 27 cu ft, covering about 81 sq ft at 4 in / 54 sq ft at 6 in; an 80 lb pre-mix bag yields about 0.6 cu ft (about 45 bags per cubic yard).
See the full Concrete Calculator for the complete how-to, unit conversions, and data sources.
Concrete Calculator for Sidewalks FAQ
How thick should a sidewalk be?
4 inches is standard for a residential walkway over a compacted base.
How much concrete for a sidewalk?
A 3 ft × 40 ft walk (120 sq ft) at 4 inches needs about 1.5 cubic yards.