Free Concrete Mix & Material Estimator

Why Do We Multiply Concrete Volume by 1.54?

When estimating materials for a slab, column, or footing, the volume you calculate from the drawings (Length × Width × Depth) is the Wet Volume of the concrete.

However, when you purchase cement, sand, and aggregate from the market, they are in a dry state. When water is added to dry materials, they shrink and compress into the voids between the coarse aggregates. According to IS code standard practices, dry volume is approximately 54% more than wet volume. Therefore, we multiply the wet volume by a constant factor of 1.54 to find the true amount of dry materials to order.

Standard Nominal Mix Ratios (IS 456)

Nominal mix concrete is used for standard, non-critical residential and commercial construction where high-grade design mix is not strictly required. The standard volumetric ratios (Cement : Sand : Aggregate) are:

Taking Your Estimate to the Next Level

Knowing the quantity of materials is only the first half of the job. To submit a winning tender or prepare a contractor bill, you must justify the rate of those materials.

By using QuickBOQ Pro, you can instantly apply prevailing CPWD DSR market rates to these exact quantities, calculating labor coefficients and GST requirements automatically.