FREE · CALCULATORS & CONVERTERS
Concrete Calculator.
Estimate wet concrete volume, cement, sand, aggregate and bags for a slab, wall, column, footing or stair waist.
Shapes are prism, cylinder or stair-waist volume. The dry factor defaults to 1.54 and cement density to 1,440 kg/m³; both are editable. Nominal mixes are site proportions. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional.
- Wet volume
- 3.78 m³
- Wet volume
- 4.944053 yd³
- Cement
- 1,197.504 kg
- Bags
- 23.95008 bags
- Sand
- 1.6632 m³
- Aggregate
- 3.3264 m³
Wet volume is the shape volume times (1 + waste/100). Dry volume is the wet volume times the dry factor. Cement is its share of the dry volume times the cement density. The nominal mix is a site proportion, not a laboratory mix design.
How to use Concrete Calculator
Choose the shape and length unit, enter the dimensions, then review the wet volume and the nominal mix breakdown.
How it works
Estimate wet concrete volume, cement, sand, aggregate and bags for a slab, wall, column, footing or stair waist. Shapes are prism, cylinder or stair-waist volume. The dry factor defaults to 1.54 and cement density to 1,440 kg/m³; both are editable. Nominal mixes are site proportions. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional.
Example
A 6 m × 4 m × 0.15 m slab.
Questions about Concrete Calculator
Is Concrete Calculator free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
Shapes are prism, cylinder or stair-waist volume. The dry factor defaults to 1.54 and cement density to 1,440 kg/m³; both are editable. Nominal mixes are site proportions. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.