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Concrete Calculators

Formwork Calculator (2026) – Shuttering & Plywood Estimator

Expert Guide
Babu

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

Wooden formwork and shuttering being prepared for a concrete beam

⚡ 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.

📐 Calculation Formula

Shuttering Area = Contact Surface Area
Ply Boards = Total Area / 32 Sq.Ft
Formwork Shuttering Diagram

📋 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).

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⚠️ 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.

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शटरिंग एरिया कैसे निकालें?

❓ Frequently Asked Questions

Calculate your total contact area in square feet and divide by 32 (the area of a standard 8ft x 4ft board). For a 1000 sq.ft slab, expect ~35-40 sheets including side boxing.
Film-faced shuttering plywood can be reused 6-10 times with proper oiling. Commercial plywood usually lasts only 2-3 uses.
Yes, for ultra-precise BOQs. This tool calculates total surface area; junctions can reduce requirements by 3-5%.

Stop Guessing. Start Building.

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    Square Feetको भ्रममा नफस्नुहोस्।(Don't get trapped in "Square Feet" rate illusions.)
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    Save up to 11% on materials with an accurate BOQ.
Worth NRs. 5,000
NRs. 999 🎯
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