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Roll stock length estimator
Estimate usable roll length, area and the shortage for a print job without unwinding.
01Enter your values
Runs in your browser02Roll stock length estimator
Runs in your browser
How it works
Estimate usable roll length, area and the shortage for a print job without unwinding.
L (m) = π × (D² − d²) / (4t); D, d: mm; t: µm
Runs in your browser
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Your data stays yours
Inputs are processed on this page and are never sent to a server.
About this tool
Use tool ↑Estimate usable roll length, area and the shortage for a print job without unwinding.
For print-shop stock checks: measure the outside diameter, core outside diameter and complete layer thickness including backing. Diameters and width are mm; thickness is µm. Annular area divided by thickness gives length. Subtract unusable leader or damage. Tight, uniform winding only; compression and air gaps cause error.
How to use it
- Enter your values
Outside roll diameter · Core outside diameter · Total layer thickness · Roll width · Job length required · Unusable length allowance
- Calculate / generate
Estimate usable roll length, area and the shortage for a print job without unwinding.
- Result
266.794667 m
Calculation method
L (m) = π × (D² − d²) / (4t); D, d: mm; t: µm
Roll stock length estimator
- Outside roll diameter
- 200 mm
- Core outside diameter
- 76 mm
- Total layer thickness
- 100 µm
- Roll width
- 1370 mm
- Job length required
- 200 m
- Unusable length allowance
- 2 m
Result
266.794667 m
Frequently asked questions
Does backing count in the thickness?
Yes. Include every layer wound onto the roll. Use measured stock thickness; verify the estimate before committing an expensive job.
Where does my data go?
Calculations run on your device. Form inputs are not sent to a server.