Estimate roll length and complete labels from diameter/thickness or a measured length.
Your input
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Result
Enter your data or use the example, then run the tool.
Worked example
OD 100 mm, core OD 40 mm and thickness 0.1 mm gives about 65.973 m. A 50 mm label plus 3 mm gap gives 1244 labels per lane.
Method
Assuming tight uniform winding, length is π(OD² − core OD²)/(4t). Floor full label-plus-gap pitches per lane before multiplying lanes.
Limits
Use core outside diameter and total effective label-plus-liner thickness. Compression and loose winding change estimates. This is stock count, not ribbon use or printer-fit validation.
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