Cement Mix Calculator

What is Cement Mix Calculator?

Estimate cement, sand, coarse aggregate and cement bags from wet concrete volume and a nominal mix ratio.

How to use the calculator

1. Enter the project dimensions and quantities.
2. Choose the correct unit for each measurement.
3. Review the calculated result and waste allowance.
4. Check the estimate against project specifications.

Formula and calculation method

Dry volume = Wet volume × dry-volume factor, then each material is allocated by the cement:sand:aggregate ratio.

Worked example

Enter representative project measurements, apply the formula shown above, and compare the calculated quantity with the purchase quantity after waste is added.

Measurement and unit explanation

Use one unit per input and confirm whether the output is cubic meters, cubic feet, cubic yards, liters, kilograms, pounds, tonnes, square meters, or block count as applicable.

Accuracy and assumptions

Nominal ratios are estimating tools, not a replacement for an engineer-approved mix design. Use project-specific density, moisture and material specifications. Results are estimates and should be checked against actual site dimensions, material specifications, waste, joints, openings, moisture, and professional requirements.