How Much Concrete for a 3x75 Sidewalk?
A sidewalk 3 feet wide and 75 feet long is 225 square feet. Poured 4 inches thick, that is 2.78 cubic yards. How much concrete for a 3x75 sidewalk with a 10 percent allowance: about 3.06 yards.
Concrete calculator →Step-by-step
- Area: 3 × 75 = 225 sq ft.
- Volume: 225 × (4 ÷ 12) = 75.0 cu ft.
- Yards: ÷ 27 = 2.78 yd³.
- Bags instead: 125 bags of 80 lb mix (167 of 60 lb).
Related: How Much Gravel for a 3x75 Walkway?
Concrete by thickness
| Thickness | Cubic feet | Cubic yards | Yards +10% | 80 lb bags | 60 lb bags |
|---|---|---|---|---|---|
| 4 in | 75.0 | 2.78 | 3.06 | 125 | 167 |
| 5 in | 93.8 | 3.47 | 3.82 | 157 | 209 |
| 6 in | 112.5 | 4.17 | 4.58 | 188 | 250 |
Thickness for walks
Most residential sidewalks are 4 inches thick on a compacted gravel base. Thicken any section that a car, mower or delivery cart will roll over, especially where the walk meets the drive.
Related: How Much Pea Gravel for a 3x75 Walkway?
Joints along the walk
Tool a control joint about every 3 feet, matching the width, which gives roughly 24 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
Slope the walk a little to one side for drainage and finish it with a broom for traction. Round the edges with an edging tool so they chip less.
Questions people ask
How many yards of concrete for a 3x75 sidewalk?
About 2.78 cubic yards at 4 inches thick.
How many bags for a 3x75 sidewalk?
About 125 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 3 feet for a 3-foot-wide walk, keeping panels close to square.
Should I add extra for waste?
Yes. Adding 5 to 10 percent covers uneven base, spillage and form bulges.
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 3x50 Sidewalk?
- How Much Concrete for a 3x60 Sidewalk?
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