Convert between pixels, mm, inches and DPI
Work out how many pixels you need for a printed size, or how big a photo will print.
- Completely free
- No hidden charges
- No sign-up
- File never leaves your device
Coming soon
Print size calculator is being built
It will work here, in your browser, like every FileFixKits tool. In the meantime, try a tool that is ready now.
See tools you can use nowHow it works
Print size calculator in three steps
- 1
Enter any two values.
- 2
See the third calculated.
- 3
Use the result in another tool.
Good to know
We round to whole pixels and show how. Official pixel rules always win over a calculated size.
Questions people ask
How many pixels is 35 × 45 mm?
At 300 DPI it is about 413 × 531 pixels.
Does DPI change file size?
No. Only the number of pixels does.
This tool is completely free.
No charges, no hidden fees, no subscription, no trial and no commitment. No card details are ever asked for.