Concrete Footing Calculator
Estimate concrete for deck piers and foundation footings
For round footings
Depth below ground
Total footings needed
Volume per Footing
—
cubic feet
Total Volume
—
cubic yards
80 lb Bags
—
bags
Estimated Cost
—
USD
How to Use This Calculator
Proper footings are the foundation of any solid structure. Our concrete footing calculator helps you determine exactly how much concrete you need.
- Check local building codes for frost depth requirements
- Determine footing diameter based on structure load
- Enter footing dimensions and quantity
- Add 10% extra for variations in hole size
- Consider using tube forms
AI Insights
Smart analysis for your project
Smart Estimates
Our AI cross-references material costs, regional pricing, and project complexity for more accurate estimates.
Waste Optimization
AI-calculated waste factors based on project type, not flat percentages. Saves 5-15% on material costs.
Best Practices
Recommendations derived from building codes, contractor data, and thousands of completed projects.
Calculation Formula
Volume per footing = pi x (Diameter/2)^2 x Depth
Total volume = Volume per footing x Quantity
Frequently Asked Questions
How deep should concrete footings be?
Footings should extend below the frost line (12"-60"+ depending on state). Check local building codes.
What diameter should deck footings be?
Standard deck footings are 12"-16" in diameter for residential decks. Larger decks may need 18"-24".
How much concrete per footing?
A 12" diameter footing that is 36" deep needs about 0.24 cubic feet or roughly 1 bag of 80lb concrete.