How Much Concrete for a 3x25 Sidewalk?
A sidewalk 3 feet wide and 25 feet long is 75 square feet. Poured 4 inches thick, that is 0.93 cubic yards. How much concrete for a 3x25 sidewalk with a 10 percent allowance: about 1.02 yards.
Concrete calculator →Step-by-step
- Area: 3 × 25 = 75 sq ft.
- Volume: 75 × (4 ÷ 12) = 25.0 cu ft.
- Yards: ÷ 27 = 0.93 yd³.
- Bags instead: 42 bags of 80 lb mix (56 of 60 lb).
Related: How Much Gravel for a 3x25 Walkway?
Concrete by thickness
| Thickness | Cubic feet | Cubic yards | Yards +10% | 80 lb bags | 60 lb bags |
|---|---|---|---|---|---|
| 4 in | 25.0 | 0.93 | 1.02 | 42 | 56 |
| 5 in | 31.2 | 1.16 | 1.27 | 53 | 70 |
| 6 in | 37.5 | 1.39 | 1.53 | 63 | 84 |
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 3x25 Walkway?
Joints along the walk
Tool a control joint about every 3 feet, matching the width, which gives roughly 7 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 a small enough pour for bagged mix and a rented mixer. 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 3x25 sidewalk?
About 0.93 cubic yards at 4 inches thick.
How many bags for a 3x25 sidewalk?
About 42 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.
How much does a cubic yard of concrete weigh?
Roughly 4,000 pounds, or about 2 tons, for normal-weight concrete.
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 6x75 Sidewalk?
- How Much Concrete for a 3x20 Sidewalk?
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