How the quantities are calculated
Follow the method, check the example and review the assumptions.
How the quantities are calculated
Follow the method, check the example and review the assumptions.
From measurements to materials
Contact area = length × width × faces × quantity. Allowed area ÷ sheet area, rounded up, gives purchase sheets.
Put the numbers in context
A 4 m × 3 m Slab Bottom / Beam Bottom (Tali) with one face has 12 m² contact area before wastage and sheet rounding.
This illustrates the method; your inputs determine your result.Assumptions to check
- The entered length and width describe one contact face.
- Sheet area is usable coverage before cuts.
Limits of this calculation
- Props, soldiers, ties, battens, release agents, reuse cycles and formwork design are not included.
Common questions
Is form-contact area the same as concrete volume?
No. Formwork is measured on surfaces touching the concrete, while concrete is measured by volume.
Does the sheet count allow for reuse?
No. The result is a gross planning count. Adjust your purchase plan for the planned reuse cycle.