Concrete Slab Calculator
Calculate concrete needed for any slab project. Our free tool provides accurate estimates for volume, materials, and costs.
Feet, inches, yards
Dimensions
ft
ft
in
Add 10% extra for waste, spills, and uneven surfaces
Pro Tips
- →Most residential slabs need 4-6 inches thickness
- →Add 10% extra concrete for waste
- →Include wire mesh or rebar for reinforcement
- →Compact gravel base to 4-6 inches
- →Use control joints to manage cracking
Technical ResultActive
5.43YD³
Includes 10% waste factor
Bags (80lb)245
Total Volume146.7FT³
Estimated Weight22,000LBS
Cubic Meters4.15M³
Cost Estimate
Estimated material costs for your project
Recommendation: Ready-Mix Concrete
For projects over 1 cubic yard, ready-mix is typically more economical and easier to work with.
Bagged Concrete (80lb)$1,348 - $1,960
245 bags × 80lb
Ready-Mix Delivery$706 - $1,186
5.43 cubic yards + delivery
Professional Installation$1,200 - $3,200
400 sq ft × $5.50/sq ft
Prices vary by location and time. Contact local suppliers for accurate quotes.