Concrete Mix Calculator
Calculate the required quantities of cement, sand, aggregate, and water for a concrete mix based on volume, mix ratio, and material density.
Published by:
isCalculator Editorial Team
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How to use this tool?
Concrete Mix Calculator helps you determine the exact weight of cement, sand, aggregate, and water needed for a concrete volume.
Step-by-Step Instructions
- Enter Volume – Input the total concrete volume in cubic meters (m³). Must be a positive number (e.g., 1).
- Set Mix Ratio – Use the format
Cement:Sand:Aggregate(e.g.,1:1.5:3). Decimals are allowed. - Adjust Densities – Modify cement, sand, and aggregate densities (kg/m³) if needed. Defaults are typical values.
- Set Water-Cement Ratio – Enter a value between 0.1 and 1 (e.g., 0.5). Controls water amount.
- Click "Calculate" – Results appear below showing each material in kilograms (kg) and water in liters (L).
Note: All inputs must be in metric units. The calculator validates entries and highlights errors in red.
Previous Results
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Frequently Asked Questions
A concrete mix ratio specifies the proportions of cement, sand, and aggregate by volume. For example, 1:1.5:3 means 1 part cement, 1.5 parts sand, and 3 parts aggregate.
The water-cement ratio is the weight of water divided by the weight of cement. It affects the workability and strength of concrete. Typical values range from 0.4 to 0.6.
Yes, you can adjust the densities of cement, sand, and aggregate based on your local materials. Default values are typical for normal weight concrete.