Calculate Cement Sand Aggregate Quantity Required

Concrete Quantity Formulas:

\[ \text{Cement (kg)} = \left[\text{Volume (m³)} \times 1.54 \times \left(\frac{1}{\text{sum ratio}}\right)\right] \times 1440 \] \[ \text{Sand (m³)} = \text{Volume} \times 1.54 \times \left(\frac{\text{sand ratio}}{\text{sum ratio}}\right) \] \[ \text{Aggregate (m³)} = \text{Volume} \times 1.54 \times \left(\frac{\text{agg ratio}}{\text{sum ratio}}\right) \]

Cement Required:

Sand Required:

Aggregate Required:

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is Concrete Quantity Calculation?

The concrete quantity calculation determines the exact amounts of cement, sand, and aggregate needed for a specific volume of concrete based on the mix ratio. This ensures proper strength and workability of the concrete mix.

2. How Does the Calculator Work?

The calculator uses these formulas:

Where:

1.54 — Dry volume multiplier (accounts for voids)
1440 — Density of cement (kg/m³)
Volume — Total required concrete volume in cubic meters
Sum ratio — Total of all mix ratios (e.g., 1:2:4 = 7)

3. Importance of Accurate Calculation

Details: Proper calculation prevents material wastage, ensures structural strength, and maintains the desired concrete properties. Incorrect ratios can lead to weak concrete or excessive costs.

4. Using the Calculator

Tips: Enter the total concrete volume needed, the sum of your mix ratios, and the individual sand and aggregate ratios. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the 1.54 factor?
A: This accounts for the dry volume being about 54% greater than the wet volume due to voids in the mix.

Q2: What's a typical mix ratio?
A: Common ratios are 1:2:4 (M15) or 1:1.5:3 (M20), where numbers represent cement:sand:aggregate.

Q3: Why multiply cement by 1440?
A: 1440 kg/m³ is the approximate density of cement used to convert volume to weight.

Q4: How accurate are these calculations?
A: They provide good estimates but actual requirements may vary slightly based on material properties and compaction.

Q5: Can I use this for different units?
A: The calculator is designed for metric units (m³ and kg). For other units, conversion would be needed.