Paper Size A4 vs Letter Converter

Paper size converter A4 vs letter dimensions in inches and mm — compare international paper sizes. Use the free Paper Size A4 vs Letter Converter below — enter your values and get instant results, right in your browser. 1 inch = 25.4 mm exactly; mm ÷ 25.4 = inches. A4 = 210 × 297 mm (8.27 × 11.69 in). US Letter = 215.9 × 279.4 mm (8.5 × 11 in). A4 is narrower but taller than Letter.

How to use the Paper Size A4 vs Letter Converter

Pakistan uses A4 (210 × 297 mm) while the US uses Letter (8.5 × 11 in / 215.9 × 279.4 mm) — and printing a Letter document on A4 (or vice versa) without adjusting causes cut-off margins. This paper size converter A4 vs letter dimensions tool converts any paper dimension between mm, cm and inches, so you can compare sizes, set correct print settings and buy the right paper the first time.

  1. Type a paper dimension (e.g. 210) into the amount field.
  2. Set From to Millimeters and To to Inches.
  3. Read the converted value instantly — it updates live.
  4. Convert both width and height to compare full sheet sizes.
  5. Use the swap button to convert inches back to mm.

Formula

1 inch = 25.4 mm exactly; mm ÷ 25.4 = inches. A4 = 210 × 297 mm (8.27 × 11.69 in). US Letter = 215.9 × 279.4 mm (8.5 × 11 in). A4 is narrower but taller than Letter.

Worked example

Type 210, mm → inches: 8.27 in. Type 297: 11.69 in. So A4 = 8.27 × 11.69 in vs Letter 8.5 × 11 in — A4 is 0.23 in narrower but 0.69 in taller. Set your printer to A4 before printing to avoid clipped edges.

Frequently asked questions

Neither overall — Letter is wider (215.9 vs 210 mm) but A4 is taller (297 vs 279.4 mm).

A4, the ISO international standard, used across Pakistan, Europe and most of Asia.

The document was formatted for one size but printed on the other. Match the printer setting to the actual paper.

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