Concrete Slab Calculator
Professional slab calculator for accurate concrete volume, material quantities and cost estimation for all types of concrete slabs
Concrete Slab Calculator
Project Type
Dimensions
Slabs, Square Footings, or Walls Shape
Add extra volume for waste, spills, and measurement variations
Concrete Strength & Pricing Guide
Concrete prices vary based on strength requirements. Different PSI ratings (3000, 4000, 5000+) come with different costs to reflect material composition and performance characteristics.
Pricing Factors:
- • Concrete strength and mix specifications
- • Delivery distance and transportation fees
- • Minimum order quantities and service charges
For current pricing in your area, contact local suppliers or visit American Concrete Institute.
Enter project parameters and click Calculate
Why Use Our Slab Calculator?
How to Calculate Slab Concrete
Follow these simple steps to calculate concrete for your slab project:
Common Slab Applications
Floor Slabs
Ground floor slabs for residential and commercial buildings. Typically 4-6 inches thick.
Garage Slabs
Heavy-duty slabs designed to support vehicle loads. Requires thicker concrete.
Basement Slabs
Foundation slabs for basements and below-grade applications with moisture considerations.
Slab Calculator Features
Precise Measurements
Input exact slab dimensions with support for both metric and imperial units.
Accurate Calculations
Get precise concrete volume calculations based on standard slab formulas.
Instant Results
Get immediate calculations with detailed material breakdown and cost estimates.
Slab Calculator FAQ
Slab thickness depends on the application: 4-6 inches (10-15cm) for residential floors, 6-8 inches (15-20cm) for garages and driveways, and 4-6 inches (10-15cm) for basement slabs. Always consult local building codes.
Multiply length × width × thickness to get volume. For example: 10ft × 12ft × 0.33ft (4 inches) = 39.6 cubic feet or 1.47 cubic yards.
C25 (3000 PSI) is suitable for most residential slabs. Use C30 (3500 PSI) or higher for heavy-duty applications like garage slabs or commercial floors.
Most slabs benefit from reinforcement. Use wire mesh or rebar for added strength, especially for larger slabs or those subject to heavy loads.
Order 5-10% extra concrete to account for waste, spillage, and slight variations in thickness. This calculator helps you get the base amount needed.
Calculate Your Slab Concrete Today
Get accurate concrete calculations for your slab project. Whether it's a garage floor, basement slab, or building foundation, our calculator provides precise volume, material, and cost estimates.