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Concrete Sidewalk & Walkway Calculator

Calculate concrete volume (cubic yards or bags) and crack control joint intervals for pedestrian sidewalks and garden pathways. Includes contraction joint tool scoring every 4 to 5 feet and full-depth isolation joints every 30 feet.

Interactive Sidewalk Calculator

ENGINEERING SCHEMATIC
Concrete Walkway & Sidewalk Geometry
Length (L) Width (W) Thickness (T: 4"–6") Surface Area = L × W
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Pro Contractor Recommendation: Pour at 4" thickness over a 2"–4" compacted sand/gravel subbase. Place isolation joints where the walk meets steps or driveways.
Quick Presets:
Sidewalk / Walkway Dimensions
Concrete Volume Required
2.72 cu yds
(73.3 cu ft / 2.08 m³)
Surface Walk Area
200 sq ft
Sidewalk flatwork footprint
Contraction Joints
12 joints
Spaced equal to walkway width
Expansion Felt Joints
1 joints
Full-depth isolation every 30 ft
Pre-Mixed Bags (80 lb)
123 bags
or 163 bags (60 lb)

Sidewalk Joint Placement Guidelines

Concrete walkways naturally shrink as water evaporates during curing. To prevent unsightly random cracks across the path:

  • Contraction (Control) Joints: Score grooves cut to 1/4 the slab depth (1 inch deep for a 4-inch walk). Space joints equal to the walkway width (e.g. a 4-foot wide walk should have joints every 4 feet).
  • Isolation / Expansion Joints: Full-depth 1/2-inch asphalt-impregnated fiberboard installed where the sidewalk meets driveways, house steps, or curbs, and at 30-to-50 foot intervals along straight runs.