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Volume · QS
Concrete Volume Calculator
Calculate concrete volume and weight for slabs, columns, beams and footings. Includes bag count and mix ratio estimates.
Element Type
Dimensions (all in mm)
Results
Volume
—
m³
With wastage
—
m³
Weight
—
tonnes
25 kg bags
—
est.
Element Schedule
No elements added. Calculate one above and click "Add to Schedule".
Total concrete (with wastage): 0.00 m³
Mix Ratios (C25)
Cement 1 part
Sand 1.5 parts
Aggregate 3 parts
Water/cement ratio ~0.45
Typical Thicknesses
Concrete slab (domestic) 100–150 mm
RC flat slab 200–350 mm
Ground beam 300–600 mm
Pad footing 300–500 mm
Column (min) 250×250 mm
Retaining wall 200–400 mm
Density Used
Normal weight reinforced concrete: 2,400 kg/m³. Lightweight concrete ~1,800 kg/m³. Plain concrete ~2,300 kg/m³.