Knowledge base
Print preparation guides
Clear explanations and exact calculations for common image and PDF printing questions.
DPI vs PPI: the practical printing difference
Learn the practical difference between DPI and PPI, and how each affects image print size and printer output.
Read guide →150 vs 300 DPI for printing
Compare 150 and 300 DPI print sizes, viewing distance, pixel requirements and practical quality trade-offs.
Read guide →Common photo print sizes and pixel dimensions
A practical reference for common photo print sizes, aspect ratios and pixel dimensions at 300 DPI.
Read guide →A4 pixels at 300 DPI
Get the exact A4 pixel dimensions at 300 and 150 DPI, plus millimetre and inch conversions.
Read guide →8 × 10 pixels at 300 DPI
Calculate the pixel dimensions for an 8 × 10 print and understand the common 4:5 crop.
Read guide →How large can I print a photo?
Find the maximum practical print size from image resolution, target DPI and viewing distance.
Read guide →PDF page size for printing
Learn how PDF page dimensions, page boxes, orientation and mixed sizes affect print output.
Read guide →A4 vs US Letter size
Compare A4 and US Letter dimensions, aspect ratios and the scaling risks when printing between standards.
Read guide →How to prepare an image for printing
A practical preflight checklist for image resolution, crop, colour, sharpening and final export.
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