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March 12, 2026

Slab Concrete Calculation: A Step-by-Step Guide

Learn how to calculate the cement, sand, and aggregate needed for your roof slab.

The Importance of Accurate Calculation

Ordering too much concrete leads to wastage, while ordering too little can ruin the casting process. Here is how you calculate it.

Calculate Volume

The formula for volume is: Length x Width x Thickness.

Example: For a 1000 sq ft slab with 5-inch thickness: 1000 x (5/12) = 416.6 cubic feet.

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