Wall 1
Length: — ft · Height: — ft · Thickness: — in · Opening length: — ft · Opening height: — ft · Number of openings: — qty
Wall volume estimator
Concrete Wall Calculator
Calculate a concrete wall and subtract repeated rectangular openings when needed.
Project
Formula
How the result is calculated
Net wall volume = length × height × thickness − total opening volume.
Worked example
Check the order logic
Opening dimensions are optional. Leave them blank when calculating a solid wall.
Assumptions
Waste and supplier rounding stay editable
The launch defaults are 10% waste and upward rounding to 0.25 yd³ or 0.10 m³. Open “Adjust assumptions and costs” to use your supplier’s increment, actual prices, density, truck capacity, or product bag yield.
Questions
What this calculator does
Can I subtract doors or openings?
Yes. Enter opening length, height, and count.
Can walls have different thicknesses?
Add another section for each thickness.
Does this calculate formwork or reinforcement?
Not in the launch version; the result covers concrete quantity and cost only.
Related tools
Continue planning
Concrete bag calculator · Ready-mix vs. bags · Concrete cost calculator
Bag yields follow the cited manufacturer data. See sources and review dates.