One image or a batch
Source images
JPEG, PNG, WebP
Static images. Up to 4 MiB per file, 12 MiB total and 4 million pixels per image. At most six source images.
Print Photo Size Tool
Convert millimetres and DPI to exact output pixels.
Open this toolPrint dimensions need a DPI basis before they can be expressed as image pixels.
Enter millimetres and resolution, then review the output against the original detail.
Inputs and controls
Width in millimetres
Tool inputs
Allowed range: 1 to 300
Height in millimetres
Tool inputs
Allowed range: 1 to 300
Print DPI
Tool inputs
Allowed range: 72 to 600
Fit behaviour
Tool inputs
Fill with crop, Whole image with canvas
Canvas background
Tool inputs
How to use
- Choose a static JPEG, PNG or WebP source. Check the displayed upload limits before processing.
- Set Width in millimetres, Height in millimetres, Print DPI, Fit behaviour and Canvas background. Review the selected units and options before preparing the output.
- Select Prepare image. Inspect the resulting preview, dimensions and file size, then download the output you need.
Why use this tool
The conversion connects physical size with a specific pixel target.
Before relying on the result
Compare the finished picture with its source. Source resolution limits real detail, and printer scaling must also be checked.
Questions
Will higher DPI create new photographic detail?
No. Source resolution limits real detail, and printer scaling must also be checked.
What should I check before using Print Photo Size Tool?
Prepare a supported source image and check Width in millimetres, Height in millimetres, Print DPI and Fit behaviour. Use the exact units shown beside the controls and replace any example values with your own inputs.
Source page last modified: 2026-10-04T18:22:35+00:00. This profile describes the tool; use its page to run it.
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