Concrete Volume Calculator
Combine project volumes, material estimates and supplier costs.
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Calculate each slab, beam or column above, then add it here. Different dimensions and m/ft units can share one project.
Up to 30 components. Each saved component retains its dimensions, count and allowance. Editing the calculator does not change saved components.
Your project is empty. Calculate a component above, then add its quantities here.
Allowances are included once per component. This sum does not combine mix grades or schedule separate pours. Budget uses one supplier rate for all components, plus one fixed charge; confirm delivery, minimum loads, pumping and taxes with your supplier. Material recipes above apply only to the current component.
How the estimate works
How the estimate works
Rectangular volume = length × width × height × count. Cylinder volume = π × (diameter / 2)² × height × count. Order volume = geometric volume × (1 + allowance / 100). The allowance is applied once.
Optional: dry ingredient volume = order volume × your dry factor. Each ingredient volume = dry volume × its ratio part / total ratio parts. Cement mass = loose cement volume × your loose bulk density; bags = mass / bag mass. Whole bags round upward. No water, sand mass or aggregate mass is inferred.
The geometry example is 5 × 4 × 0.15 m with 10% allowance: 3 m³ geometric and 3.3 m³ order volume. It is a teaching example, not a recommended allowance or structural design.