Files stay on your device
Free. No account needed.Screen to real size
Calibrate a ruler preview and export A4 tiled templates.
Files and calculations stay in this browser.
From screen to real size
Place a real ruler against the line below. Adjust until the line matches the reference length below, then confirm. Recalibrate after zoom, display or window changes.
50 mm
PDF scale uses millimetres independently of screen calibration. Print at 100% / Actual size, never Fit. Check the 50 mm ruler on every page. Cut on the dashed printable border and align the overlap; red guides mark repeated areas. A4 portrait, 10 mm margins, maximum 64 sheets. Without an image, a 10 mm grid template is produced.
How it works
- Review your inputs and the supported scope.
- Set constraints, run the operation and inspect the evidence.
- Reopen downloaded output before using it.
Example & practical use
Enter your own files or measurements; review the computed result and its stated limits.
Limits and help
Calibration is device/zoom specific; print at 100% and check the printed ruler.
Your files are yours.
Image and text processing happens in your browser. Your files are not uploaded to our servers.
Troubleshooting
Check the original file format and selection limit. Renaming an extension does not convert a file. For a very large image, close other heavy tabs and try a smaller copy.