Formwork Calculator – Shuttering & Plywood Estimator

Expert Guide

A unified structural shuttering estimator. Instantly pull contact surface areas for any concrete element to budget your plywood, timber, or steel plates.

Concrete and RCC construction site with worker pouring concrete

⚡ Quick Answer

To estimate plywood for a slab, take the net area and add the perimeter edge boxing (Depth x Perimeter). Standard 8x4 plywood covers 32 sq.ft. For bulk ordering and labor costs, visit pro.nirmansutra.com.

🛠️ How It Works

Toggle the structural member mode.
Enter the concrete casting dimensions.
The system calculates only the contact surface area (top surfaces are excluded).
Total square footage is converted to standard 32 sq.ft plywood sheets.

📋 Real-Life Example

Example: Shuttering for typical 9"x12" beam (3m length).
1. Side 1 = 0.3 * 3 = 0.9 m².
2. Side 2 = 0.3 * 3 = 0.9 m².
3. Bottom = 0.23 * 3 = 0.69 m².
4. Total Area = 2.49 m² (≈ 26.8 sq.ft).

⚠️ Common Mistakes to Avoid

Ignoring the edge boxing for slabs (can be 5-10% of total area).
Ordering plywood based on floor area only, ignoring columns and beams.

❓ Frequently Asked Questions

How many times can plywood be reused?

Film-faced shuttering plywood can be reused 6-10 times with proper oiling and handling. Unfaced commercial plywood may only last 2-3 uses.