Examples
Examples
Try the starting example
- Pallet load length (mm)
- 1200
- Pallet load width (mm)
- 1000
- Load height (mm)
- 1000
- Applied film width (mm)
- 500
- Vertical overlap (%)
- 50
- Body passes
- 1
- Extra bottom turns
- 2
- Extra top turns
- 2
- Applied-to-unstretched length ratio
- 2
- Unstretched roll length (m)
- 300
- Body turns per pass
- 3
- Applied film path (m)
- 30.814193
- Unstretched film consumed (m)
- 15.407097
- Whole rolls required
- 1
Try another scenario
- Pallet load length (mm)
- 500
- Pallet load width (mm)
- 500
- Load height (mm)
- 300
- Applied film width (mm)
- 500
- Vertical overlap (%)
- 0
- Body passes
- 1
- Extra bottom turns
- 0
- Extra top turns
- 0
- Applied-to-unstretched length ratio
- 1
- Unstretched roll length (m)
- 1
- Body turns per pass
- 1
- Applied film path (m)
- 2
- Unstretched film consumed (m)
- 2
- Whole rolls required
- 2
Calculation method
Calculation method
Body turns per pass
One full starting turn plus roundUp(max(0,height−film width)/(film width × (1−overlap/100))).
Applied film path (m)
Each body pass has one perimeter turn plus helical turns spanning the remaining height. Add the extra top and bottom perimeter turns.
Unstretched film consumed (m)
Applied path divided by the supplied applied-to-unstretched length ratio.
Whole rolls required
Round up unstretched consumption / roll length.
Symbols and units
- a
- Pallet load length (mm)
- b
- Pallet load width (mm)
- c
- Load height (mm)
- d
- Applied film width (mm)
- e
- Vertical overlap (%)
- f
- Body passes
- g
- Extra bottom turns
- h
- Extra top turns
- i
- Applied-to-unstretched length ratio
- j
- Unstretched roll length (m)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Ideal rectangular-perimeter/helical centreline model using applied film width. Each body pass includes one full edge turn; extra edge turns are additional. Stretch ratio is length-based, not percent elongation. Neck-down, corner radii, overlap distortions, tails and damage are excluded.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
OpenStax: arithmetic and geometry ↗
Background reading; this does not imply endorsement or independent review of SumFizz.