1. What Are Concrete Mix Ratios?

Concrete mix ratios specify the proportion of cement, sand, and gravel in the concrete mixture. Standard ratios like M15 (1:2:4) and M20 (1:1.5:3) ensure the desired strength and workability of concrete.

2. How Does the Calculator Work?

The calculator uses standard mix ratios:

Calculation Method:

• Total parts = Cement + Sand + Gravel
• Cement (kg) = (1440 × Volume × Cement ratio) / Total parts
• Sand (m³) = (Volume × Sand ratio) / Total parts
• Gravel (m³) = (Volume × Gravel ratio) / Total parts

3. Importance of Proper Mix Ratios

Details: Correct ratios ensure concrete has the right strength, durability, and workability. Incorrect ratios can lead to weak structures or wasteful over-engineering.

4. Using the Calculator

Tips: Select the desired concrete grade (M15 or M20) and enter the required volume in cubic meters. The calculator will provide the exact quantities needed.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between M15 and M20 concrete?
A: M20 has a higher cement content (1:1.5:3 ratio) making it stronger than M15 (1:2:4), suitable for more demanding applications.

Q2: Can I use this for small projects?
A: Yes, the calculator works for any volume, from small DIY projects to large construction jobs.

Q3: How accurate are these calculations?
A: They provide good estimates for standard mixes. For precise requirements, consult a structural engineer.

Q4: What if I need a different grade?
A: Special mixes (like M25 or M30) require different ratios not included in this basic calculator.

Q5: Does this account for water content?
A: No, water-cement ratio (typically 0.4-0.6) should be determined separately based on workability needs.