Sidewalk Cement Calculator
Estimate the concrete yards and bags needed for your project
Calculation Results
Total Cubic Yards:
0.00
Total Cubic Feet:
0.00
Bags Required (Approx):
- 80lb Bags: 0
- 60lb Bags: 0
How to Use the Sidewalk Cement Calculator
Planning a new walkway, garden path, or sidewalk requires precision to avoid multiple trips to the hardware store or over-ordering ready-mix concrete. Our Sidewalk Cement Calculator helps you determine exactly how much material you need based on the dimensions of your project.
Standard Sidewalk Dimensions
For most residential sidewalks, the standard thickness is 4 inches. This is sufficient for foot traffic and light lawn equipment. However, if the sidewalk is part of a driveway apron or expects heavy vehicle crossing, 6 inches is often recommended.
The Calculation Formula
To calculate concrete volume manually, use the following steps:
- Length × Width: Calculate the surface area in square feet.
- Convert Depth: Divide the thickness (inches) by 12 to get feet (e.g., 4 / 12 = 0.33 ft).
- Calculate Cubic Feet: Multiply Area × Depth (ft).
- Convert to Cubic Yards: Divide total cubic feet by 27.
Example Calculation
If you are building a sidewalk that is 30 feet long, 4 feet wide, and 4 inches thick:
- Area = 30 × 4 = 120 sq. ft.
- Volume = 120 × (4/12) = 40 cubic feet.
- In Yards = 40 / 27 ≈ 1.48 cubic yards.
Concrete Bag Coverage
If you are mixing the concrete yourself using bags, keep in mind these standard yields:
- 80lb Bag: Yields approximately 0.60 cubic feet.
- 60lb Bag: Yields approximately 0.45 cubic feet.
- 40lb Bag: Yields approximately 0.30 cubic feet.
Always add a 10% waste factor to your total. This accounts for spillage, uneven subgrades, and variations in formwork depth.