Basic
Concrete Footing Calculator
Calculate concrete requirements for deck footings, post footings, and foundation footings. Footings distribute the weight of structures to the soil and are essential for stable construction. This calculator helps you determine the exact volume needed for your footing project.
Enter Your Measurements
Formula Used
Volume (cu ft) = Length × Width × Depth × Quantity Volume (cu yd) = Volume (cu ft) ÷ 27
Pro Tips
- •Footing depth should extend below the frost line in your area
- •Check local building codes for minimum footing sizes
- •Sonotubes make forming round footings easier
- •Allow concrete to cure for at least 7 days before loading
Frequently Asked Questions
How deep should deck footings be?
Deck footings should extend below the frost line, which varies by region from 12 inches in warm climates to 60+ inches in cold areas. Check your local building codes.
What size footing do I need for a 6x6 post?
A 6x6 post typically requires a footing at least 12 inches in diameter or a 16x16 square footing. For heavy loads, use larger footings.