Question 1

What is the difference between A4 and Letter?

Accepted Answer

A4: 210×297mm (8.27×11.69 in). Letter: 216×279mm (8.5×11 in). Letter is wider, A4 is taller.

Question 2

Which is more common, A4 or Letter?

Accepted Answer

A4 is international standard (ISO 216). Letter is US/Canada standard. A4 used by most countries.

Question 3

Is this conversion mathematically exact?

Accepted Answer

Yes, this converter uses precise conversion factors based on international standards. Results are accurate to the displayed precision.

Question 4

Can I use this for professional applications?

Accepted Answer

This converter is suitable for educational and general purposes. For critical professional applications, always verify with authoritative sources.

A4 to Letter Paper Size Converter

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