Concrete Slab Foundation Cost Calculator

Estimate Slab Foundation Costs

Slab Dimensions

Length (feet)

Width (feet)

Thickness (inches)

Pricing (Local Rates)

Concrete Price ($ per cubic yard)

Labor Price ($ per sq ft)

Include site preparation costs ($2.50/sq ft for excavation, gravel, vapor barrier)

How to use: Enter your slab dimensions and adjust local pricing. Default values reflect average U.S. costs. Concrete typically costs $125-175 per cubic yard, labor $5-8 per sq ft.

Note: Actual costs vary by location, project complexity, and market conditions. Always get multiple quotes for accurate estimates.

Frequently Asked Questions

How much does a 20x20 concrete slab cost?

A 20×20 foot (400 sq ft) concrete slab at 4 inches thick costs approximately $2,400-3,600 total. This includes materials ($600-900), labor ($2,000-2,400), and site prep ($600-1,000). Regional prices vary significantly.

What affects concrete slab cost?

Key cost factors include: slab thickness (4" vs 6"), site accessibility, soil conditions requiring extra prep, reinforcement (rebar/wire mesh), finish type (broom vs. smooth), and local concrete delivery fees.

Is it cheaper to pour concrete yourself?

DIY can save 40-60% on labor costs ($2,000-3,000 for a typical garage slab). However, it requires tools, equipment rental (mixer, forms), proper site prep knowledge, and physical labor. Small projects benefit most from DIY; large slabs often justify professional work.