Millimeters and DPI determine the pixel dimensions
The conversion is mm ÷ 25.4 × DPI. At 300 DPI, 35 mm is roughly 413 pixels, so the layout is based on intended print size rather than arbitrary screen pixels.
Free browser tool
Create printable multi-up ID photo layouts for common paper and photo sizes.
Place repeated copies of one photo on an A4 canvas using a specified physical size and DPI. The defaults are 35×45 mm at 300 DPI with 5 mm spacing.
The source image is drawn directly into the requested width and height. If its aspect ratio differs, it can look stretched; crop to the intended ID-photo ratio first.
The conversion is mm ÷ 25.4 × DPI. At 300 DPI, 35 mm is roughly 413 pixels, so the layout is based on intended print size rather than arbitrary screen pixels.
The canvas is 210×297 mm and placement starts with a 5 mm offset and 5 mm gaps. Larger requested photos naturally reduce the number of copies that fit.
The tool does not detect a face, preserve the original aspect ratio or crop around a subject. Prepare the source photo to the target proportions before creating the sheet.
A correctly sized PNG can print at the wrong dimensions if the print dialog uses “fit to page” or other scaling. Check for 100% or actual-size printing when exact dimensions matter.