A4 at 300 DPI
210×297 mm needs about 2480×3508 px. Smaller files mean lower effective DPI and visible rasterization.
Formula: px = (mm ÷ 25.4) × DPI. See scale / DPI.
Is 150 DPI enough?
Often yes for large posters viewed from a distance.
Enter mm size, DPI and your file dimensions — see required px and effective DPI.
210×297 mm needs about 2480×3508 px. Smaller files mean lower effective DPI and visible rasterization.
Formula: px = (mm ÷ 25.4) × DPI. See scale / DPI.
Often yes for large posters viewed from a distance.