Cement Sand Aggregate Quantity Calculator

Work out cement sand aggregate quantity instantly with clear inputs, formula shown and shareable results.

About Cement Sand Aggregate Quantity Calculator

Dry materials occupy more space than the concrete they produce because water fills the voids, so wet volume is multiplied by about 1.54 to get dry volume. That dry volume is then split by the nominal mix parts. Cement volume is converted to bags using a bulk density of 1440 kg/m³ and 50 kg per bag.

Formulas

Dry volume

Dry = wet volume x 1.54

Material split

Each material = dry volume x its part / sum of parts; cement bags = cement m³ x 1440 / 50

Worked example

With the default values below, Cement Sand Aggregate Quantity Calculator returns Cement required of 80.6. Change any input above and every figure here is recalculated in your browser.

Inputs used

Wet concrete volumeminimum 0.01 m³: 10 m³
Nominal mixone of M15 — 1 : 2 : 4, M20 — 1 : 1.5 : 3, M25 — 1 : 1 : 2: M20 — 1 : 1.5 : 3
Dry volume factoraccepts 1–2: 1.54

Results

Cement required: 80.6 bags
Fine aggregate: 4.200 m³
Coarse aggregate: 8.400 m³
Dry volume of materials: 15.400 m³

Step by step

1Values used
2Dry volume
3Material split
4Cement required= 80.6 bags
5Fine aggregate= 4.200 m³
6Coarse aggregate= 8.400 m³
7Dry volume of materials= 15.400 m³

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Cement Sand Aggregate Quantity figure worked out?

Dry = wet volume x 1.54. Dry materials occupy more space than the concrete they produce because water fills the voids, so wet volume is multiplied by about 1.54 to get dry volume.

Why 1.54 and not 1.52 or 1.57?

The factor covers bulking of sand and the voids in the aggregate, both of which vary with grading and moisture. Anything between 1.52 and 1.57 is defensible; 1.54 is the common site value.

What values do I need to enter?

This calculator takes 3 inputs: Wet concrete volume, Nominal mix, Dry volume factor. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.