Concrete & Masonry

Concrete Wall Calculator

Estimate poured concrete wall volume in cubic yards and cubic feet while subtracting window and door openings and adding order allowance.

Enter wall length, height and thickness. Subtract the combined opening area before applying the chosen order allowance.

Calculation and worked example reviewed 2026-11-12. See our calculation methodology.

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Concrete & Masonry

Enter your measurements

US UNITS

Wall length

Wall height

Openings to subtract

sq ft

Wall thickness

Order allowance

Optional: Material Price ($ / unit)

YOUR ESTIMATE

5.7 cu yd to plan5.43 cu yd geometry

220 sq ft net wall × 8 in thickness.

5% order allowance shown separately.

Formula and example

How this calculation works

This estimator converts your entered jobsite inputs (wall length, wall height, openings to subtract, wall thickness, order allowance) into consistent US trade units, computes the exact geometric baseline first, and then applies any selected waste or order allowance so you can verify both numbers before purchasing materials.

How does the concrete wall calculator formula work?

Concrete cu ft = (wall length × wall height − openings in sq ft) × thickness in inches ÷ 12; divide by 27 for cubic yards.

(Concrete Wall Calculator)

where:

Wall length – Entered in ft (default reference: $30 ft$ );
Wall height – Entered in ft (default reference: $8 ft$ );
Openings to subtract – Entered in sq ft (default reference: $20 sq ft$ );
Wall thickness – Entered in in (default reference: $8 in$ );
Order allowance – Entered in % (default reference: $5 %$ );

The formula

Inputs to result

Concrete cu ft = (wall length × wall height − openings in sq ft) × thickness in inches ÷ 12; divide by 27 for cubic yards.

Worked example

Check the math

A 30 ft × 8 ft wall, 8 in thick, with 20 sq ft of openings has 146.67 cu ft of concrete, or 5.43 cu yd before allowance.

Quick lookup chart

Poured Concrete Wall Volume Reference (8 ft Wall Height, No Openings)

Geometric volume for an 8 ft tall wall before subtracting window/door openings.

Wall Length	6 in Thick Wall	8 in Thick Wall	10 in Thick Wall
20 ft length	2.96 cu yd	3.95 cu yd	4.94 cu yd
30 ft length	4.44 cu yd	5.93 cu yd	7.41 cu yd
40 ft length	5.93 cu yd	7.90 cu yd	9.88 cu yd
60 ft length	8.89 cu yd	11.85 cu yd	14.81 cu yd

Limits and field checks

Before you use this result

The opening deduction is a simple area subtraction. Footings, pilasters, thickened edges, keyways, form loss and structural wall design are separate checks.

Subtract only major window, door, and garage door block-outs; small utility sleeves rarely reduce a ready-mix truck order.
Poured stem walls and basement walls require separate footing volume calculations—use the Concrete Footing Calculator for the base.
Include 5% to 8% extra volume for pump line priming, form deflection under hydrostatic pressure, and chute waste.

Questions answered

Calculator FAQ

Should I subtract doors and windows?+

Yes. Enter their combined wall-face area. Confirm whether small penetrations warrant a deduction on the actual job.

Does this calculate a footing?+

No. Calculate the footing separately and add its volume to the wall quantity.