Formwork Area Calculator (m²) | Columns · Beams · Walls · Slabs

Steps

1. Pick the element type (rectangular/round column, beam, wall, slab, footing).

2. Enter dimensions in metres and the quantity. Optionally name the row.

3. Add more elements with “Add element”.

4. Set a waste allowance (%) for cutting and laps (often 5–10%).

5. Read gross area, waste and total formwork m² in the results panel.

Element formulas

• Rectangular column

  2 × (section width + depth) × height × qty

• Round column

  π × diameter × height × qty

• Beam

  (width + 2 × height) × length × qty

• Wall / shear wall

  2 × length × height × qty

• Slab

  width × length × qty

• Footing (sides only)

  2 × (length + width) × height × qty

Total formwork = gross + (gross × waste % / 100). Waste is a guidance allowance for cutting, laps and spare panels.

Practical tips

• Enter metres (e.g. 40 cm → 0.40).
• Tune waste to your panel module (e.g. 50×100 cm steel panels).
• Chamfers and special details must be added separately.
• After area, estimate props / table forms with the related tools.

Continue after formwork area

For supports and reinforcement:

• Telescopic prop calculator→
• Table form calculator→
• Concrete slab m³ calculator→
• Rebar metering calculator→