Concrete Calculator (Cement, Sand, Aggregate)
Calculate concrete volume and mix material quantities for any grade from M5 to M30 — useful for slabs, columns, beams, footings.
Enter section dimensions and click Calculate.
Standard Mix Ratios (IS 456)
| Grade | Ratio (C:S:A) | Typical Use |
|---|---|---|
| M5 | 1 : 5 : 10 | PCC, levelling course |
| M7.5 | 1 : 4 : 8 | PCC, mass concrete |
| M10 | 1 : 3 : 6 | PCC under footings, flooring |
| M15 | 1 : 2 : 4 | Plain footings, lightly loaded RCC |
| M20 | 1 : 1.5 : 3 | RCC slabs, beams, columns (residential) |
| M25 | 1 : 1 : 2 | RCC for higher load — design mix preferred |
| M30 | 1 : 0.75 : 1.5 | Heavy structures, water tanks — design mix |