Shipping Strap Length and Roll Yield Calculator
How many whole loads can a strap roll supply when bands run around both vertical load planes?
Method, formula and assumptions
Band cut length is twice the two dimensions of its loop plus seal/tail allowance. Multiply each plane's cut by band count and sum. Whole roll yield = floor(usable roll/per-load length).
Input definitions and supported units
- Load length (m): Measured or assumed numerical value, from 0.01 to 10; must be positive.
- Load width (m): Measured or assumed numerical value, from 0.01 to 10; must be positive.
- Load height (m): Measured or assumed numerical value, from 0.01 to 10; must be positive.
- Bands around length-height plane: Whole-number count, from 0 to 100; zero is supported where the stated method permits it.
- Bands around width-height plane: Whole-number count, from 0 to 100; zero is supported where the stated method permits it.
- Extra seal/tail length per band (m): Measured or assumed numerical value, from 0 to 10; zero is supported where the stated method permits it.
- Usable strap on roll (m): Measured or assumed numerical value, from 0 to 1000000; zero is supported where the stated method permits it.
Worked example with answer
A 1.2 x 1 x 1.5 m load with two bands in each plane and 0.2 m tails uses 5.6 m and 5.2 m band cuts: 21.6 m/load. A 1,000 m usable roll supplies 46 whole loads.
How to use the results
Allowance is per band, not per load. Floor roll yield prevents counting a final incomplete strap set as a secured load.
Results retain full precision internally and display up to four decimal places. Very small nonzero results use scientific notation rather than appearing as zero. Check the labels before comparing values across units.
Limitations and references
Length arithmetic does not determine required band count, strength, edge protection or securing adequacy. Follow the packaging and transport professional's specifications.
The method is a self-contained arithmetic, geometric or explicitly stated mathematical model. There are no imported tariffs, empirical presets or equipment specifications; measured values and allowances must come from your own process.
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Creator & reviewers
Creator persona
- Riley ChenTime planning & productivity
Reviewer personas
- Avery BennettPersonal finance & everyday budgeting
- Devon ShawFormula & assumptions review