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Concrete Calculator

Calculate cement bags, sand, and aggregate required for slabs, footings, and columns for M15, M20, and M25 mixes.

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Input Units:

* Automatically incorporates standard civil 1.54 dry volume shrinkage factor.

Required Cement Quantity

25 Bags

(1210 kg total cement)

Sand (Fine Aggregate):

44.5 cu.ft (2.02 metric tons)

Aggregate / Gravel (Coarse):

88.99 cu.ft (3.78 metric tons)

Wet Concrete Volume:3 m³ (105.94 cu.ft)

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How to use Concrete Calculator

1

Dimensions

Enter Length, Width, and Thickness in meters or feet.

2

Mix Grade

Select mix proportion (e.g. M20 1:1.5:3).

3

Material Quantities

Get exact bags of cement, tons of sand, and aggregate.

Key Features of Concrete Calculator

Slab, footing, and column volume calculation (Length x Width x Height)
Presets for M15 (1:2:4), M20 (1:1.5:3), and M25 (1:1:2) nominal mixes
Applies standard 1.54 dry volume factor automatically
Outputs cement in standard 50 kg bags, sand in cu.ft and tons

Frequently Asked Questions

Dry cement, sand, and aggregate contain voids; when mixed with water, the wet volume shrinks by roughly 54%.