Concrete Slab Volume
Use the Concrete Slab Volume. Enter Slab area (ft²) and Thickness (in) for a clear result, formula explanation, and practical planning checks.
Concrete Slab Volume measurements
Enter your values, then calculate.
Result
How to calculate concrete slab volume
This calculator finds the volume of a rectangular concrete slab from its length, width, and thickness.
How the calculation works
Volume = Length × Width × (Thickness in inches ÷ 12), converted to cubic yards by dividing by 27.
Example
A 15 ft × 12 ft slab at 4 inches thick: Volume = 15 × 12 × 0.333 = 59.9 cubic feet, or about 2.22 cubic yards.
Frequently asked questions
How is Result calculated?
Result = [Slab area] × ([Thickness] ÷ 12) ÷ 27.
Is the Concrete Slab Volume free to use?
Yes — every calculator on Simple Calculator Tools is free, runs in your browser, and does not require an account.
Concrete Slab Volume
Volume = Length × Width × (Thickness in inches ÷ 12), converted to cubic yards by dividing by 27.
Let's understand your concrete slab volume result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for Concrete Slab Volume
- Order 5-10% extra concrete to account for uneven subgrade and minor form leakage.
- Double check thickness is entered in inches, not feet, since this is the most common unit-mixing error in slab volume calculations.
Common Concrete Slab Volume Mistakes to Avoid
- Entering thickness in feet instead of inches, which produces a wildly oversized volume estimate.
When to Use This Calculator
This calculator finds the volume of a rectangular concrete slab from its length, width, and thickness.