How to use this calculator
Start with the deterministic fixture values already shown, then replace each input with measurements from your job. Use consistent units and review the highlighted assumptions before using the result in purchasing or production.
Formula and method
Each allowed integer dot width is converted to millimetres at the chosen DPI. The candidate with the smallest absolute distance from the requested X-dimension is selected. Optional module and quiet-zone counts produce physical widths.
Read the methodology and source notes →
Read the complete choose a printable barcode x-dimension guide →
Worked example
For a desired 0.33 mm module at 300 DPI across 2–6 dots, 4 dots is closest at 0.3387 mm (+2.63%). Ten quiet-zone modules occupy about 3.387 mm on each side.
How to interpret the result
Compare candidates, not only the highlighted value. A different integer width may be required to meet the specification that governs your symbol.
Limitations
There is no universal barcode minimum. Symbology, data, scanning distance, substrate, application and the current governing specification determine X-dimension, height and quiet zones.
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