Concrete Slab area coverage for 94 lb cement

🛠 How the Concrete Slab Calculator Works

The calculator follows a structured approach to compute the concrete volume, cement weight, and number of 94lb cement bags based on the selected slab shape, dimensions, and mix ratio.

🔢 Step-by-Step Calculation Process

🏗️ Simple Concrete Slab Calculation

1️⃣ Convert Inputs to Feet

• If dimensions are in inches:
  Value in feet = Value in inches ÷ 12

2️⃣ Calculate Concrete Volume

• Rectangle/Square Slab:
  Volume = Length × Width × Thickness
• Circular Slab:
  Volume = 3.1416 × (Diameter ÷ 2)² × Thickness

3️⃣ Apply Mix Ratio (Cement: Sand: Gravel)

• Total Mix Ratio = Cement + Sand + Gravel
• Cement Volume = (Cement Ratio ÷ Total Mix Ratio) × Concrete Volume
• Sand Volume = (Sand Ratio ÷ Total Mix Ratio) × Concrete Volume
• Gravel Volume = (Gravel Ratio ÷ Total Mix Ratio) × Concrete Volume

4️⃣ Convert Cement Volume to Weight

• Cement Weight = Cement Volume × 3.15 × 62.4

5️⃣ Calculate the Cement Bags Needed

• Bags of Cement = Cement Weight ÷ 94

📌 Example Calculation

Inputs:

• Shape: Rectangle
• Length = 10 ft
• Width = 5 ft
• Thickness = 6 in → 0.5 ft
• Mix Ratio = 1:2:4

Step-by-Step Calculation:

• Volume = 10 × 5 × 0.5 = 25 ft³
• Total Mix Ratio = 1 + 2 + 4 = 7
• Cement Volume = (1 ÷ 7) × 25 = 3.57 ft³
• Cement Weight = 3.57 × 3.15 × 62.4 = 702.5 lbs
• Bags of Cement = 702.5 ÷ 94 ≈ 8 bags

Final Output: