How to Change PDF Page Dimensions: Convert US Letter to A4 & A3 to A4

Published: 2026-02-19 | Read Time: 3 min read

Resize document paper sizes between US Letter (8.5 × 11 in), A4 (210 × 297 mm), A3, Legal, and Tabloid without cutting off margin text.

Frequently Asked Questions

What is the exact difference between US Letter and A4?

US Letter is 8.5 × 11.0 inches (215.9 × 279.4 mm). International A4 is 8.27 × 11.69 inches (210 × 297 mm) — slightly narrower and taller.