Concrete Proportion Calculator — Calculate Concrete Mix Ratios

Concrete Proportion Calculator

Calculate concrete mix proportions for your construction projects. Determine cement, sand, aggregate quantities and costs for different concrete grades.

Step 1: Concrete Mix Design

10 m³
5%

Understanding Concrete Mix Ratios

Standard concrete mixes are expressed as cement:sand:aggregate ratios. M25 (1:1:2) is common for structural work, while M15 (1:2:4) is used for non-structural applications.

Step 2: Material Costs

$6.00
$40.00
$60.00

About Concrete Materials

Cement binds the mix, sand fills voids and provides workability, while aggregate provides strength. Prices vary by region and quality. Always add 5-10% for waste and spillage.

Concrete Proportion Results

Summary
Grade Comparison
Material Breakdown

Total Concrete Cost

$1,250
Based on 10 m³ of M25 concrete including 5% waste
Cement Required
80 bags
Sand Required
5.5 m³
Aggregate Required
11 m³
Cost Per m³
$125

Concrete Grade Comparison

Concrete Grade Mix Ratio (C:S:A) Cement Required Total Cost Cost per m³

Material Cost Breakdown

Concrete Mix Formula

Concrete Volume = (Cement + Sand + Aggregate) × (1 + Waste%)

To calculate material quantities: Multiply each component ratio by total volume, then add waste percentage. Costs are calculated by multiplying quantities by material prices.

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