TEKEEY Tools
Cement Calculator
Enter your total concrete volume and mix ratio to estimate the number of 50kg cement bags — plus sand and ballast — you'll need.
Not sure of your volume? Use the Concrete Calculator first.
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.
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.
Based on indicative Nairobi-area supplier prices. Materials cost only — excludes labour, transport and delivery. Confirm current rates with your supplier before ordering.
Need a professional estimate or BQ?
This tool gives you a planning-stage figure. For a certified estimate, request TEKEEY's professional services.
Related service: ConstructionEstimates 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.