Print Proof Scale Calibration Calculator

Method, formula and assumptions

Axis correction percentage = intended span / measured printed span x 100. Observed scale uses the inverse ratio. Evaluate X and Y separately to reveal nonuniform output scaling.

Input definitions and supported units

• Intended horizontal span (mm): Measured or assumed numerical value, from 0.01 to 10000; must be positive.
• Printed horizontal span (mm): Measured or assumed numerical value, from 0.01 to 10000; must be positive.
• Intended vertical span (mm): Measured or assumed numerical value, from 0.01 to 10000; must be positive.
• Printed vertical span (mm): Measured or assumed numerical value, from 0.01 to 10000; must be positive.

Worked example with answer

A 100 mm horizontal span printed at 98 mm needs 102.0408% correction. A 200 mm vertical span printed at 202 mm needs 99.0099%; observed scales are 98% and 101%.

How to use the results

Unequal corrections indicate anisotropic scaling or measurement error. Check printer scaling settings first instead of automatically distorting source artwork.

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

Does not calibrate color, registration or paper deformation. Use sufficiently long test marks and repeat measurements after changing driver or press settings.

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.

Related planning tools

• Duplex Registration Correction Calculator
• Bleed and Safe Area Geometry Calculator

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