Work out concrete wall volume instantly with clear inputs, formula shown and shareable results.
Wall concrete is the net elevation area, gross area less openings, multiplied by the thickness. Formwork is counted on both faces because each has to be erected, tied and stripped, and it is normally the dominant cost item in a concrete wall.
Wall volume
V = (length x height - openings) x thickness
Formwork
Area = net wall area x 2 faces
V = (length x height - openings) x thickness. Wall concrete is the net elevation area, gross area less openings, multiplied by the thickness.
Standard measurement rules usually ignore openings below about 0.5 m² because the formwork and labour saved are negligible against the extra detailing.
This calculator takes 4 inputs: Wall length, Wall height, Wall thickness, Area of openings. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.