Concrete Calculator
Concrete Slab Calculator
Calculate concrete volume and materials needed for a rectangular slab
About Concrete Calculation
Understanding Concrete Measurements
Concrete is typically measured in cubic yards (yd³) in the US and cubic meters (m³) in most other countries. When ordering concrete, it's common practice to add 5-10% extra to account for spillage, settling, and slight variations in dimensions.
Concrete Mix Ratios
A standard concrete mix typically consists of:
- 1 part cement
- 2 parts sand
- 3 parts aggregate (gravel)
- 0.5-0.6 parts water
Concrete Strength
Different applications require different concrete strengths:
- 2500-3000 PSI: Residential slabs, sidewalks, and driveways
- 3500-4000 PSI: Foundations, footings, and commercial applications
- 4500-5000 PSI: Heavy-duty industrial floors and high-traffic areas
- 5000+ PSI: Bridges, parking structures, and other high-stress applications