About US Letter to A4 Paper Size Converter & Scaling Calculator
Specialized cross-border document conversion utility. Compares US Letter (8.5x11 in / 215.9x279.4 mm) and International ISO A4 (210x297 mm) dimensions, calculates exact shrink-to-fit scaling percentages (94.1% and 97.3%), and highlights printable margin crop hazards.
Key Capabilities & Features
- Exact dimensional delta: Letter is 5.9 mm (0.23") wider; A4 is 17.6 mm (0.69") taller
- Non-destructive scaling percentage calculator (94.1% for A4 on Letter; 97.3% for Letter on A4)
- Side-by-side aspect ratio analysis (1:1.294 vs 1:1.414)
- Prepress guidance preventing clipped footers, headers, and lateral text blocks
How to Use US Letter to A4 Paper Size Converter & Scaling Calculator
Review Dimensional Differences
Observe the 5.9 mm width and 17.6 mm height variations.
Check Printer Scale Percentage
Use 94.1% when printing A4 onto Letter, or 97.3% when printing Letter onto A4.
Adjust PDF Print Settings
Set your PDF viewer to "Custom Scale" with the calculated percentage to prevent cutoffs.
Privacy & In-Browser Execution Guarantee
100% private in-browser analysis.
Frequently Asked Questions
Why does printing an A4 document on US Letter paper cut off the bottom?
A4 is 17.6 mm (nearly 0.7 inches) taller than US Letter. If printed at 100% scale, the bottom page numbers and footnotes will be cropped off unless "Fit to Printable Area" or 94.1% scaling is selected.
Which countries use US Letter instead of A4?
Only the United States, Canada, and parts of Mexico and Central America use US Letter as the default office paper format. The rest of the world uses ISO A4.