Photo pixels and print size: prepare the dimensions you need

Convert physical photo dimensions to pixels, understand cropping and review a document-photo image before submitting it.

Updated October 4, 2026

Dimensions are only one part of a photo requirement

A document-photo upload can specify width, height, file format, file size, background and face placement. FolioSprint’s photo-size tool addresses cropping and pixel dimensions. It does not inspect compliance, replace the background or guarantee acceptance.

Use the issuing authority’s current instructions for the actual requirements. Do not assume that a size used for one document is suitable for another.

Convert physical size to pixels

Multiply a dimension in inches by the intended pixels per inch. For example, 2 inches multiplied by 300 gives 600 pixels, so a 2 × 2 inch image at 300 pixels per inch uses 600 × 600 pixels.

For millimeters, divide by 25.4 to get inches before multiplying. This calculates a pixel count; it does not establish that the photograph meets the authority’s other requirements.

Understand the crop

The current photo-size workflow crops from the center to fill the requested rectangle. A portrait with the face near an edge may lose important content. Check the downloaded image for head placement, shoulders and required margins.

If the center crop cannot preserve the composition you need, prepare a better-framed source image rather than submitting an unsuitable crop.

Check quality and file size

Enlarging a low-resolution photo does not restore facial detail. Start with a clear photograph taken in the required lighting and background conditions.

Select an accepted output format, then inspect the final size. If the upload has a strict byte limit, adjust quality or use Compress images. Review the compressed image again: meeting a byte limit is not useful if the face has become blurry.

Keep the source until acceptance is confirmed

Save the original and the submitted copy separately. That makes it easier to adjust dimensions or compression if the receiving system asks for a different version.