Saddle-Stitch Creep Allowance Calculator

Method, formula and assumptions

A folded sheet supplies four booklet pages. Maximum creep = (nested sheets - 1) x measured creep increment. Subtract that maximum from the uncorrected outside text margin.

Input definitions and supported units

• Booklet pages including self-cover: Whole-number count, from 4 to 1000; must be positive.
• Measured creep increment per added folded sheet (mm): Measured or assumed numerical value, from 0 to 5; zero is supported where the stated method permits it.
• Designed outside text margin (mm): Measured or assumed numerical value, from 0 to 100; zero is supported where the stated method permits it.

Worked example with answer

40 pages use ten nested sheets. At a measured 0.1 mm creep increment per additional sheet, maximum allowance is 0.9 mm; an 8 mm outside margin leaves 7.1 mm before compensation.

How to use the results

Enter a measured or printer-provided folded-sheet increment, not an assumed universal paper rule. The outermost sheet is the zero reference.

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

This is a linear planning allowance, not a bindery calibration. Stock compressibility, cover changes, folding and trimming affect the actual creep schedule.

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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