Foundation Wall Concrete Calculator

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Foundation wall concrete calculator for length, height, thickness, and waste. For footing sizing context, check the footing size guide before you order.

Inputs

Tip: Add extra waste for wall forms with returns, pilasters, or thickened corners.

Results

Concrete volume
8.69 yd³
234.67 ft³
80-lb bags (rough)
391.11
Assumes ~0.6 ft³ yield per 80-lb bag (varies by mix).

FAQ

  • How thick are foundation walls? Many residential walls are 8–10 inches, but check local code or structural plans.
  • Do foundation walls need rebar? Most do. Reinforcement is based on height, loads, and soil conditions.
  • Should I add more waste? Add extra if the wall has returns, pilasters, or irregular formwork.

Assumptions

  • Wall is rectangular with uniform thickness.
  • Waste accounts for form variation and spillage.
  • 80-lb bag yield is an approximation; check product labels.

Example

A 40 ft wall at 8 ft tall and 8 inches thick with 10% waste is about 8.69 yd³.

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