TEKEEY PROJECTSEngineering · Construction · PM

TEKEEY Tools

Concrete Calculator

Enter your dimensions and mix ratio to estimate concrete volume and the indicative cement, sand and ballast quantities required.

For any load-bearing element — columns, beams, structural or suspended slabs — the mix or concrete grade must come from your structural engineer's design, not a rule-of-thumb choice here.

Wet volume

3 m³

Dry volume (bulked)

4.62 m³

Cement (incl. wastage)

20 bags

Sand (incl. wastage)

1.45 m³

Ballast (incl. wastage)

2.8 m³

Quantities include standard site wastage allowances — cement +3%, sand +10%, ballast +6% — reflecting how each material is typically lost to spillage and handling on site.

Indicative material cost
Cement (20 bags)Ksh 15,000
Sand (1.45 m³)Ksh 4,495
Ballast (2.8 m³)Ksh 7,000
Total materialsKsh 26,495

Based on indicative Nairobi-area supplier prices. Materials cost only — excludes labour, transport and delivery. Confirm current rates with your supplier before ordering.

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This tool gives you a planning-stage figure. For a certified estimate, request TEKEEY's professional services.

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Related service: Construction

Estimates provided by TEKEEY Tools are preliminary and intended for planning purposes only. Actual construction costs, quantities and engineering requirements depend on project-specific designs, site conditions, specifications, material prices and professional assessment.