Volume concreto
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
L×C×H×1.05
About this calculator
The concrete volume calculator estimates the amount of concrete needed for construction projects. It multiplies length (L), width (C), and height (H) of the space to be filled, then adds a 5% waste allowance common in construction. The formula is L × C × H × 1.05, where the first values represent dimensions in meters and the 1.05 factor accounts for losses during application.
This tool is useful for slabs, foundations, floors, or concrete blocks. For example, a slab with 10m length, 5m width, and 0.15m thickness would calculate as 10 × 5 × 0.15 × 1.05 = 7.875 m³. The result indicates the quantity of ready-mix concrete or the proportion of raw materials (cement, sand, gravel) to prepare.
Measure dimensions accurately and use consistent units (usually meters). The 5% waste factor is an average; for large or complex projects, adjusting to 7-10% may be necessary. Rounding results upwards is recommended to ensure sufficient material availability.
Frequently asked questions
Why add a 5% waste factor?
Concrete pouring involves unavoidable losses like material waste, application imperfections, and measurement errors. The 1.05 factor ensures sufficient material to cover these variations.
Should measurements be in meters?
Yes, dimensions must be provided in meters to return the volume in cubic meters. Use converters if needed.
Is this calculator suitable for foundations?
Yes, but complex foundations (like rafts or piles) require specific engineering calculations. Consult a professional for critical structural projects.
Can I use it for pre-mixed concrete?
Yes, the cubic meter result indicates the exact amount of ready-mix concrete to order from suppliers.