Concrete Wall Calculator: Yards, Bags and Cost

Concrete Wall Calculator

Estimate poured-wall concrete, whole bags, ready-mix, form-contact area, weight and cost.

Combined door and window area through the full thickness.
Add a second wall group
Leave at zero to exclude this group.
Bags, ready-mix, forms and cost
Two large wall faces only.

Use actual mixed yield, delivered ready-mix price and local project rates.

Concrete to order—
—Net wall face area
—Whole bags
—Bag / ready-mix material cost
—Two-face form contact
—Planned concrete weight
—Truck capacity equivalents
—Bag / ready-mix project cost
—Openings deducted
—Included wall groups

How to calculate concrete for a wall

Enter the finished length, height and concrete thickness. Openings are entered as combined face area per identical wall and are deducted through the full thickness. Use the second group when another wall has different dimensions.

Formulas

Net face area = (length × height − openings) × wall count. Concrete volume = net face area × thickness. The extra allowance applies once to the combined volume. Two-face form contact = 2 × net face area; it excludes wall tops, ends, opening returns, footings and pilasters.

Checked example

A 30 × 8 ft wall, 8 in thick, with one 3 × 7 ft opening has 219 ft² of net face area and 146 ft³ of concrete. With 10% extra, order 160.6 ft³ = 5.948 yd³ or 268 bags at 0.60 ft³ each. The two large faces total 438 ft².

Important limits

  • This calculator estimates poured concrete quantities; it does not calculate concrete blocks, CMU core fill or mortar.
  • It does not select wall thickness, concrete strength, reinforcement, footing, drainage, lateral support, form ties, pour rate or code compliance.
  • Opening deductions assume the opening passes through the full wall thickness. Add back lintels, jamb thickening or other solid regions as separate wall dimensions when needed.
  • Form contact includes only the two large wall faces. Returns, tops, ends, bulkheads, pilasters, reuse cycles, bracing and hardware are excluded.
  • Bag yield, density, ready-mix minimums, short-load fees, delivery, taxes, pumping and access must be confirmed with suppliers.

Related calculators

Use the Concrete Calculator for basic slabs, the Foundation Concrete Calculator for footings, walls and slabs together, or the Concrete Block Calculator for masonry units.