Steel Quantity Calculator (Slab, Beam, Column, Footing)

Expert Guide

Estimate total reinforcement steel needed for specific structural components based on concrete volume and percentage.

Steel rods and rebar being tied by worker on construction site

⚡ Quick Answer

Structural steel is estimated as a % of concrete volume. Slabs use 80-100 kg/m³, columns 120-250 kg/m³. For shop drawings and exact bar-bending schedules, visit pro.nirmansutra.com.

🛠️ How It Works

Total Weight (kg) = Concrete Volume (m³) × (Steel Percentage / 100) × 7850 (Density of steel). Higher percentages (2-3%) should be used for seismic zones in Nepal.

Select the component (Slab, Beam, Column, or Footing).
Enter the dimensions to calculate the concrete volume.
Adjust the steel percentage (%) based on your structural design.

📐 Calculation Formula

Weight (kg) = Volume × ( % / 100 ) × 7850

📋 Real-Life Example

Example: Steel for 5m × 4m × 0.15m RCC Slab at 1.0%.
1. Volume = 5 * 4 * 0.15 = 3.0 m³.
2. Steel = 3.0 * 0.01 * 7850 = 235.5 kg.
3. In Tonnes = 0.24 T.

❓ Frequently Asked Questions

What is the thumb rule for steel in slabs?

For residential RCC slabs in Nepal, steel ranges from 0.70% to 1.00% of concrete volume (~80 kg/m³). For seismic zones, use 1.2%. See our [Structural Guide](https://blog.nirmansutra.com/) for details.

How much steel is used in columns?

Columns require 2% to 3% of concrete volume (~160-240 kg/m³). In Nepal seismic Zone V regions, always use the upper range.

Where can I get a detailed BBS for my project?

For a full Bar Bending Schedule with shop drawings, visit [pro.nirmansutra.com](https://pro.nirmansutra.com/).