Expert Guide
Concrete & RCC
Slab Master Estimator – Concrete, Steel & Formwork
Quality Inspector
The definitive tool for site engineers. Provides a single-click breakdown of all requirements for a concrete slab.
📐 Formula & Method
Calculates concrete using wet-to-dry factor (1.54). Steel weight is based on volume and density of steel (7850 kg/m³). Shuttering area is based on bottom soffit area.
Volume = L × W × T
Steel = Vol × % × 7850
📋 Worked Example
10m x 5m slab (150mm thick): • Concrete: 7.5 m³ • Steel (1.0%): 588 kg • Shuttering: 50 m²
❓ Frequently Asked Questions
For standard residential RCC slabs, the steel percentage typically ranges from 0.7% to 1.0% of the concrete volume.
This calculator provides net quantities. It is recommended to add 3-5% for concrete wastage and 5% for steel overlapping/wastage.
Professional House Estimation
Get a complete, itemized cost breakdown and material list for your entire project with Nirmansutra Pro.