Foundation Calculator

Calculate foundation requirements, excavation, and materials for various foundation types

Foundation Specifications

Foundation Type

Building Length (feet)

Building Width (feet)

Soil Type

Frost Depth (inches)

Enter foundation specifications to calculate requirements

Slab Foundation: Concrete slab on grade
Best for: Warm climates, flat sites

Crawl Space: Raised foundation with access
Best for: Moderate climates, sloping sites

Basement: Below-grade living space
Best for: Cold climates, extra storage

Rock/Gravel: Excellent bearing capacity
Minimal foundation requirements

Clay/Organic: Poor bearing capacity
Requires deeper foundations

Frost Depth: Foundation below frost line
Prevents frost heave damage

Concrete: 1 cubic yard per 80 sq ft
For 4-inch thick slab

Rebar: 1 ton per 1000 sq ft
For reinforcement

Gravel: 1 cubic yard per 100 sq ft
For base preparation