Pier Foundation Calculator

A pier foundation uses a grid of concrete cylinders drilled into the ground to support a building's load — the Pier Foundation Calculator estimates how much concrete you'll need and what it will cost. Enter your building length, building width, pier spacing, pier diameter, pier depth, and concrete price to get the total concrete volume, number of piers, concrete material cost, and concrete per pier.

ft
ft
ft

Distance between pier centers

inches
ft
$/cubic yard

Results

Total Concrete Volume

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Number of Piers

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Concrete Material Cost

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Concrete per Pier

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Frequently Asked Questions

How do I determine the right pier spacing for my foundation?

Typical pier spacing ranges from 6-12 feet depending on the load requirements and building type. For most residential structures, 8-foot spacing is common. Consult with a structural engineer for specific load calculations.

What diameter should my foundation piers be?

Pier diameter typically ranges from 8-24 inches. Larger diameters provide more bearing capacity but require more concrete. 12-inch diameter piers are common for most residential applications.

How deep should foundation piers be installed?

Pier depth depends on soil conditions and local building codes. Typically 2-4 feet deep, but may need to go deeper in areas with poor soil or frost concerns. Check local building codes for minimum requirements.

Should I order extra concrete for my pier foundation?

Yes, it's recommended to order 5-10% extra concrete to account for variations in hole size, spillage, and measurement errors. Having slightly more is better than running short during the pour.

Can I use this calculator for other foundation types?

This calculator is specifically designed for pier foundations. For slab foundations, footings, or other foundation types, different calculations and considerations apply.

What factors affect the cost of concrete for pier foundations?

Concrete costs vary by location, quantity ordered, delivery distance, and current market prices. Additional costs include delivery fees, pumping if needed, and labor for installation.

Do I need permits for pier foundation construction?

Most pier foundation projects require building permits and inspections. Check with your local building department for specific requirements and to ensure compliance with local codes.