How Much Concrete for a 6x40 Sidewalk?
A sidewalk 6 feet wide and 40 feet long is 240 square feet. Poured 4 inches thick, that is 2.96 cubic yards. How much concrete for a 6x40 sidewalk with a 10 percent allowance: about 3.26 yards.
Concrete calculator →Step-by-step
- Area: 6 × 40 = 240 sq ft.
- Volume: 240 × (4 ÷ 12) = 80.0 cu ft.
- Yards: ÷ 27 = 2.96 yd³.
- Bags instead: 134 bags of 80 lb mix (178 of 60 lb).
Related: How Much Concrete for a 6x40 Slab?
Concrete by thickness
| Thickness | Cubic feet | Cubic yards | Yards +10% | 80 lb bags | 60 lb bags |
|---|---|---|---|---|---|
| 4 in | 80.0 | 2.96 | 3.26 | 134 | 178 |
| 5 in | 100.0 | 3.70 | 4.07 | 167 | 223 |
| 6 in | 120.0 | 4.44 | 4.89 | 200 | 267 |
Thickness for walks
Four inches is the usual thickness for a residential walk that only sees foot traffic. Where the walk crosses a driveway, pour that section at 6 inches, since car tires will cross it.
Related: How Much Pea Gravel for a 6x40 Walkway?
Joints along the walk
Tool a control joint about every 6 feet, matching the width, which gives roughly 6 joints along this walk. Add an isolation joint where the walk meets the house, steps or a driveway so the slabs can move independently.
How to buy it
This is past the point where bags are practical; call a ready-mix plant. If the truck cannot reach the far end of the walk, plan for wheelbarrows or a chute extension; see how far a concrete chute reaches.
Slope and finish
Give the walk a slight cross slope, around 1/4 inch per foot, so water sheds to one side. A light broom finish across the walk gives grip when it is wet.
Questions people ask
How many yards of concrete for a 6x40 sidewalk?
About 2.96 cubic yards at 4 inches thick.
How many bags for a 6x40 sidewalk?
About 134 bags of 80 lb concrete at 4 inches.
How thick should a sidewalk be?
Four inches for foot traffic, 6 inches where vehicles cross.
How far apart should sidewalk joints be?
About every 6 feet for a 6-foot-wide walk, keeping panels close to square.
How many 80 lb bags make a cubic yard?
About 45. Each 80 lb bag yields roughly 0.6 cubic feet, and a cubic yard is 27 cubic feet.
Related guides
- Concrete Sidewalk Thickness for Walks and Crossings
- How Much Concrete for a Sidewalk? Yards per Foot
- How Much Area Does a Yard of Concrete Cover?
- How Many Bags of Concrete in a Yard? 40, 60, 80 lb
- Gravel Base Under a Concrete Slab: Depth and Tons
- How Many Yards in a Concrete Truck? Mixer Sizes
- Concrete Short Load Fee: What It Is and How to Cut It
- 60 lb vs 80 lb Concrete Bags: Yield, Count, and Cost
- Rebar vs Wire Mesh in a Slab: Which One to Use
- How Much Concrete for a 6x25 Sidewalk?
- How Much Concrete for a 6x30 Sidewalk?
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