AutoCAD PDF Is Correct but Physical Print Is Wrong
The saved PDF is correct on screen and measures properly, but the physical printer/plotter output is different. Start by identifying exactly where the problem first appears, then test the most likely causes one at a time. This avoids changing a correct drawing to compensate for a PDF, driver or printer problem.
Symptoms — confirm exactly what is wrong
- The saved PDF is correct on screen and measures properly, but the physical printer/plotter output is different.
- A correct Preview is strong evidence that the drawing and Page Setup are basically correct.
- Compare the saved PDF before involving the physical printer; this separates PDF creation from printer/viewer behavior.
Beginner rule: Change one setting at a time. After each change, repeat the same test so you know what actually fixed the problem.
30-second triage: Treat Preview → saved PDF → physical paper as three separate stages. The first stage that becomes wrong is the stage you should troubleshoot.
Likely causes — check these in order
| Likely cause | Why it creates this symptom | Quick check |
|---|---|---|
| PDF viewer is scaling the page | The PDF may be correct but the viewer prints it smaller or larger. | In the PDF print dialog, check Actual Size / 100% versus Fit/Shrink. |
| Printer driver changed | Driver updates can change media names, printable areas and device capabilities. | Compare driver version, media list and a known-good Page Setup. |
| Printable area is smaller than expected | The device cannot mark all the way to the nominal paper edge. | Compare the border with the dashed printable boundary in the Layout. |
| Wrong paper source or roll | The driver/PC3 can select a media source different from the one loaded. | Open device Custom Properties and compare roll/tray/media source. |
| Windows spooler/printer queue problem | AutoCAD may finish sending the job while the OS queue or printer never completes it. | Open the Windows printer queue and inspect job status/errors. |
For the underlying setup behind these checks, use AutoCAD PDF Is the Wrong Scale: How to Fix It and Printers & Plotters while you diagnose the symptom.
Diagnostic path — isolate the responsible setting
Work through the checks in order. Do not apply a fix until its diagnostic check differs from the known-good project standard.
Diagnostic 1 — PDF viewer is scaling the page
Where: Saved PDF > PDF viewer > Print dialog.
Do this: In the PDF print dialog, check Actual Size / 100% versus Fit/Shrink.
Check: If this differs from the known-good project standard, correct it and retest before continuing.
Diagnostic 2 — Printer driver changed
Where: Windows printer properties/driver information, then the AutoCAD PC3/Page Setup.
Do this: Compare driver version, media list and a known-good Page Setup.
Check: If this differs from the known-good project standard, correct it and retest before continuing.
Diagnostic 3 — Printable area is smaller than expected
Where: PAGESETUP > Modify.
Do this: Compare the border with the dashed printable boundary in the Layout.
Check: If this differs from the known-good project standard, correct it and retest before continuing.
Diagnostic 4 — Wrong paper source or roll
Where: PAGESETUP > Printer/Plotter > Properties/Custom Properties > media or roll settings.
Do this: Open device Custom Properties and compare roll/tray/media source.
Check: If this differs from the known-good project standard, correct it and retest before continuing.
Diagnostic 5 — Windows spooler/printer queue problem
Where: Windows printer queue/spooler after AutoCAD has sent the job.
Do this: Open the Windows printer queue and inspect job status/errors.
Check: If this also matches the known-good setup, use the isolation test below instead of changing unrelated settings.
Fixes — use only the fix that matches your diagnosis
Fix 1 — Correct the PDF print setting
Use this fix when: your diagnosis confirmed that PDF viewer is scaling the page.
Do this: In the PDF viewer, select the matching physical paper and Actual Size / 100%.
Check: Compare Preview, the fresh PDF and paper again; stop at the first stage that becomes wrong.
Fix 2 — Revalidate plotting after the driver update
Use this fix when: your diagnosis confirmed that Printer driver changed.
Do this: Recheck PC3, paper names, printable area, custom media and a border calibration plot. Update the controlled setup only after testing.
Check: Compare Preview, the fresh PDF and paper again; stop at the first stage that becomes wrong.
Fix 3 — Move critical border content inside the printable area
Use this fix when: your diagnosis confirmed that Printable area is smaller than expected.
Do this: Use the dashed printable boundary for the actual device. If the border standard requires more area, use a device/media configuration that supports it.
Check: Compare Preview, the fresh PDF and paper again; stop at the first stage that becomes wrong.
Fix 4 — Choose the correct roll/tray
Use this fix when: your diagnosis confirmed that Wrong paper source or roll.
Do this: Open the printer/plotter Custom Properties and select the intended roll, tray or media source, then save it in the controlled PC3/Page Setup if appropriate.
Check: Compare Preview, the fresh PDF and paper again; stop at the first stage that becomes wrong.
Fix 5 — Clear the OS/printer queue issue
Use this fix when: your diagnosis confirmed that Windows spooler/printer queue problem.
Do this: Cancel stuck jobs, restart/reconnect the printer queue as appropriate, then send a simple Windows test page before returning to AutoCAD.
Check: Compare Preview, the fresh PDF and paper again; stop at the first stage that becomes wrong.
Verification — prove the fix before full production
- Run Plot Preview and confirm the original symptom is absent there.
- Create a fresh PDF from exactly the same Page Setup and compare it with Preview.
- Print that same PDF at Actual Size / 100% on the intended media.
- Record which stage changed scale, margins, orientation, color or lineweight before approving the fix.
Still not fixed? Use an isolation test
Save a fresh PDF from the same Page Setup and compare it directly with Preview. Then print that exact PDF. Do not skip a stage.
Prevention — reduce the chance of recurrence
- Keep one known-good PDF and one physical calibration sheet for important output devices.
- Do not edit the DWG when Preview and PDF are already correct; troubleshoot the downstream stage.
- Standardize PDF viewer printing instructions for scale-critical documents.
- Retest device behavior after driver, firmware, roll/media or PC3 changes.
Official Autodesk references
Use these references when the interface, driver or plot-style behavior on your workstation differs from the checks above.
Frequently asked questions
What should I check first?
Start with PDF viewer is scaling the page. Use the quick check in the diagnostic section before changing anything else.
What if that check is correct?
Move to Printer driver changed. The goal is to eliminate causes one at a time, not to change several settings together.
If Plot Preview is correct, should I edit the drawing?
Usually no. Create and inspect the PDF next; if that is also correct, focus on the PDF viewer, printer driver or physical device.
Explore more in CAD Printing & Plotting Troubleshooting.