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Paper Size Converter

Convert paper sizes — A4, Letter, Legal — with millimeter and inch dimensions. Fit US Letter content onto A4 correctly — free, local, no signup.

100% Local Browser Native

How to Use the Paper Size Converter

1. Pick the size

A4, Letter, Legal, or photo sizes.

2. Read dimensions

Millimeters and inches together.

3. Set print size

Match the shop's required standard.

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Frequently Asked Questions

A4 vs Letter size?

A4 is 210×297 mm; Letter is 8.5×11 in (216×279 mm) — Letter is wider and shorter. Content reflows slightly between them.

Printing across standards?

Scale-to-fit preserves content with small margins; exact-size crops edges. Choose fit for reading, exact for forms.

Do paper specs upload?

No — math runs locally in your browser. Nothing leaves your device.

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Last updated October 2026