How Much Concrete for a 4x25 Sidewalk?
A sidewalk 4 feet wide and 25 feet long is 100 square feet. Poured 4 inches thick, that is 1.23 cubic yards. How much concrete for a 4x25 sidewalk with a 10 percent allowance: about 1.36 yards.
Concrete calculator →Step-by-step
- Area: 4 × 25 = 100 sq ft.
- Volume: 100 × (4 ÷ 12) = 33.3 cu ft.
- Yards: ÷ 27 = 1.23 yd³.
- Bags instead: 56 bags of 80 lb mix (75 of 60 lb).
Related: How Much Gravel for a 4x25 Walkway?
Concrete by thickness
| Thickness | Cubic feet | Cubic yards | Yards +10% | 80 lb bags | 60 lb bags |
|---|---|---|---|---|---|
| 4 in | 33.3 | 1.23 | 1.36 | 56 | 75 |
| 5 in | 41.7 | 1.54 | 1.70 | 70 | 93 |
| 6 in | 50.0 | 1.85 | 2.04 | 84 | 112 |
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 4x25 Walkway?
Joints along the walk
Tool a control joint about every 4 feet, matching the width, which gives roughly 5 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
At 1.23 yards, a ready-mix truck is usually easier than bags. Long walks are often poured in sections, so ask the plant how long the truck can wait and whether there is a short-load fee.
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 4x25 sidewalk?
About 1.23 cubic yards at 4 inches thick.
How many bags for a 4x25 sidewalk?
About 56 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 4 feet for a 4-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 4x15 Sidewalk?
- How Much Concrete for a 4x20 Sidewalk?
As an Amazon Associate, AsphaltTons.com earns from qualifying purchases. Product links below are sponsored.