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Construction Material Calculator

HomeConstruction CostMaterial Calculator

Enter the size of the slab, wall or plaster area and get cement bags, M-Sand and blue metal in units, and brick or block counts, in the quantities Tenkasi suppliers actually sell. Use it to budget before you call for rates.

Concrete: slab, footing or floor

Concrete volume2.36 m³ (83 cu ft)
Cement20 bags
M-Sand35 cu ft (0.35 units)
Blue metal70 cu ft (0.7 units)

Bricks or blocks for a wall

Pieces needed (incl. 5% wastage)591 blocks
Per square foot1.125 blocks

Plastering (1 : 4 mix)

Cement9 bags
P-Sand40 cu ft (0.4 units)

Estimates use standard nominal-mix thumb rules (dry volume factor 1.54, one bag = 0.0347 m³, one unit = 100 cu ft). Add 5 to 10% for wastage on sand and aggregate. Your engineer's design mix takes precedence.

How the calculator works

  • Concrete: wet volume is converted to dry volume with the 1.54 factor, then split by the nominal mix ratio. Cement is shown in 50 kg bags of 0.0347 m³; sand and aggregate in cubic feet and units of 100 cu ft.
  • Walls: pieces per square foot for each wall type, plus 5% for breakage and cutting. Deduct door and window openings from the wall area before entering it.
  • Plaster: a 1 : 4 cement to P-Sand mix with a 1.27 dry volume factor. Ceilings and smooth block walls take 10 to 12 mm; rough brick and external walls take 15 to 20 mm.

Buying the materials

Once you have the quantities, order sand and aggregate in whole units and cement by the bag. We deliver M-Sand, P-Sand, blue metal, cement and bricks and blocks on combined trips across Tenkasi district. For the full-house picture see the construction cost guide, or call +91 76676 66264 and we will check your numbers free of charge.

Quantities

Common Questions

About 8 bags of cement, 0.42 m³ (15 cu ft) of M-Sand and 0.84 m³ (30 cu ft) of 20 mm blue metal, using the 1 : 1.5 : 3 nominal mix and a dry volume factor of 1.54.
About 10 to 11 chamber bricks per square foot for a 9-inch wall and 5 to 6 for a 4.5-inch wall. Solid or hollow blocks with a 16 x 8 inch face need about 1.1 to 1.2 per square foot, and AAC blocks about 0.8.
For 12 mm plaster in a 1 : 4 mix, roughly 40 cu ft of P-Sand (about 0.4 unit) and 8 bags of cement per 1,000 sq ft. External 15 mm plaster needs about 25% more.
In Tamil Nadu, sand and aggregate are sold by the unit, which is 100 cubic feet or about 2.83 cubic metres. A TKR tipper carries up to four units per trip, and per-unit rates assume a full 4-unit load.