PPI and printer DPI: related words, different claims
Understand what source-image PPI proves, what printer hardware DPI describes, and why one number cannot guarantee print quality.
Read guidePrint-resolution boundaries
Print-resolution guides with the boundary visible
Three guides explain PPI versus DPI, exact pixel math, target-density decisions, and what arithmetic cannot certify.
Pixels, print size, and exact physical-unit conversion
Follow pixels = inches × PPI in all three directions and keep centimetres, millimetres, and whole-pixel rounding explicit.
Read guideHow to choose a target PPI without inventing a universal threshold
Use printer requirements, viewing conditions, source quality, and intended size instead of treating one preset as a guarantee.
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