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Concrete Floor Cost Calculator

Installing a poured concrete floor typically costs between $6.00 and $12.00 per square foot for basic to smooth-troweled indoor slabs, and $12.00 to $18.00+ per square foot for polished or decorative stamped floors. Total cost includes ready-mix concrete ($140–$175/yd³), crushed stone subbase, vapor retarder, steel crack reinforcement, and professional finisher labor.

Interactive Concrete Floor Cost Calculator

ENGINEERING SCHEMATIC
Concrete Floor Cross-Section (Subbase, Vapor Barrier, Mesh & Pour)
4" Compacted Crushed Stone Subbase (#57 Stone) 10–15 Mil Poly Vapor Retarder Smooth Trowel / Polished Wear Surface Poured Concrete Slab (3,500–4,000 PSI) Welded Wire Mesh / #4 Rebar Grid @ Mid-Depth 4"–6" T
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Pro Contractor Recommendation: Indoor concrete floors require a 4" compacted gravel capillary break and a 10-15 mil vapor retarder to prevent floor moisture transmission and mold.
Quick Presets:
Floor Slab Dimensions
Materials, Finish & Reinforcement
Site Prep, Rates & Ready-Mix Pricing
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Total Estimated Concrete Floor Cost
$ 4,526.13

Estimated range: $3,847 – $5,431

Unit Cost Per Square Foot
$ 7.86 / sq ft
576 total square feet
Ready-Mix Concrete
$ 1,173.33
7.82 cu yds @ $150
Labor & Pour Crew
$ 2,016.00
Placing, leveling & finishing
Subbase Gravel
$ 386.40
11.0 tons crushed stone
Rebar / Mesh & Vapor Barrier
$ 374.40
Moisture & crack protection
Specialty Finish
$ 576.00
Surface trowel / polish fee

Concrete Floor Cost Breakdown by Component

When budgeting an interior concrete slab, garage floor, or basement replacement, costs divide into distinct engineering layers:

Component Typical Rate Purpose & Best Practice
Crushed Stone Subbase (4") $0.50 – $1.00 / sq ft Compacted crushed stone prevents capillary water wicking and provides uniform load-bearing support.
Vapor Retarder (10–15 Mil) $0.25 – $0.45 / sq ft Crucial for interior floors to stop ground moisture vapour from permeating finished flooring or promoting mold.
Crack Reinforcement $0.40 – $0.85 / sq ft Welded wire mesh (6x6 W1.4) or #4 rebar grid placed on chairs at mid-slab depth keeps shrinkage hairline cracks tightly closed.
Ready-Mix Concrete (4" 3500-4000 PSI) $1.85 – $2.50 / sq ft High-strength mix design with air entrainment or water reducers for durable wear resistance.
Placement & Trowel Labor $3.00 – $5.50 / sq ft Power screeding, multiple mechanical power trowel passes for a burnished dust-free surface.
Specialty Polishing / Staining $3.00 – $8.00+ / sq ft Diamond grinding, densifier application, dye coloring, and stain-resistant sealers.

Typical Concrete Floor Costs by Size

  • 1-Car Garage Slab (12 × 24 ft / 288 sq ft): $2,000 – $3,500 total
  • 2-Car Garage Slab (24 × 24 ft / 576 sq ft): $4,000 – $6,500 total
  • 3-Car Garage Floor (24 × 36 ft / 864 sq ft): $6,000 – $10,000 total
  • Full Basement Floor (1,200 sq ft): $8,500 – $14,000 total