/convert/a-series-to-b-series/ Convert A series (size) to B series instantly with a reference conversion table. article A series (size) to B series Converter — 247QuickTools
📄 Paper Sizes

A series (size) to B series Converter

Convert A series (size) to B series instantly with a reference conversion table.

A series (size) to B series
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Common conversions
A series (size) B series
Formula:

How to convert A series (size) to B series

1

Enter your value

Type the number of a series (size) you want to convert into the left box. The result in b series appears instantly in the right box. You can also type into the right box to convert in the other direction.

2

Use the swap button

Click the ⇄ Swap button to reverse the conversion — B series to A series (size). Your current value carries across so you don't have to re-enter anything.

3

About A series (size) and B series

A series (size) and B series are common paper measurements.

Reviewed for 2026. A series (size) ↔ B series conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.

Frequently asked questions

How do I convert A series (size) to B series?

Use the calculator above to convert A series (size) to B series instantly.

How many B series are in 1 A series (size)?

Use the calculator above to find the exact conversion.

Is the A series (size) to B series converter free?

Yes, the A series (size) to B series converter is completely free with no sign-up required, no downloads, and it works offline once the page has loaded.