Paper Size Conversion Tools

Created By : Jatin Gogia
Reviewed By : Phani Ponnapalli
Last Updated at : May 1,2023

You may now use the Paper Size Converter Tools to speed up your calculations even more. The simple utility allows the user to convert between several paper sizes and formats. The converter is quite simple to use. Simply choose the things you want from two drop-down menus- Choose the size of the paper you wish to convert. Choose the units of conversion. To see the dimensions, click the "Convert" button.

Size / Format

Paper Size Conversion Tools: If converting different paper sizes is challenging for you and you are unfamiliar with the order of operations, there is no need to worry since you can use the online Paper Size Conversion Tools to help you. You will learn about the manual method of problem resolution in the section that follows.

What are Paper Size Standards?

Various paper size standards regulate the size of paper used as writing paper, stationery, and cards, as well as some printed documents. The ISO 216 standard, which includes the commonly used A4 size, is the international standard for paper size.

What is the North American System and the International System for Paper Sizes?

International systems have a format that encompasses a ratio of the square root of two (1.414) that distinguishes them from their North American counterparts. In this way, it is a good system that allows a user to easily change a document's size or format by printing it in an alternate ISO size or format.

How do you convert paper size manually? (A series)

In the ISO standard,The most commonly used one is A-series. It has aseries of paper sizes, all starting with the letter A, followed by a number. As the number gets smaller, paper size increases.

In order to convert the paper size of the A series manually, you need to learn & apply some basic principles. For conversion, we have to divide the height by the width of all formats which is the square root of two (1.4142:1).

Utilize our free online paper size converter and do more calculations regarding paper sizes and get results at a faster pace. Are you looking for more math conversion calculators, then visit and convert different units and a variety of sizes so easily.

ISO Paper Size Chart

The following chart of paper size will make you learn the dimensions of A series, B series, and C series in different unit conversions. For a quick reference to solve any common paper sizes you can refer to this paper size conversion table/chart.


A series

B series

C series


mm × mm

inch × inch

mm × mm

inch × inch

mm × mm

inch × inch


841 × 1,189

331⁄8 × 4619⁄24

1,000 × 1,414

393⁄8 × 552⁄3

917 × 1,297

361⁄12 × 51+1⁄12


594 × 841

233⁄8 × 331⁄8

707 × 1,000

275⁄6 × 393⁄8

648 × 917

251⁄2 × 361⁄12


420 × 594

1613⁄24 × 233⁄8

500 × 707

192⁄3 × 275⁄6

458 × 648

181⁄24 × 251⁄2


297 × 420

1117⁄24 × 1613⁄24

353 × 500

1311⁄12 × 192⁄3

324 × 458

123⁄4 × 181⁄24


210 × 297

81⁄4 × 1117⁄24

250 × 353

95⁄6 × 1311⁄12

229 × 324

9 × 123⁄4

Solved Example of Paper Size Conversion


For the blueprint of the plot, paper is required of the dimension 38cm x 46.5cm. What should be the size of paper to buy?


To calculate the size of the paper, we need to refer to the above table, where the dimensions are given in mm.

So we have to convert the given dimension of 38 cm x 46.5 cm into mm first.

For that, we will multiply both units in cm by 10.

So, we get dimensions as 380 mm x 465 mm.

Now, we will check the above chart for the nearby values.

We will get nearby dimensions as 420 × 594 (in mm) for the A2 size paper.

So, for the dimension of 38 cm x 46.5 cm, we need A2 size paper.

FAQs on Online Paper Size Scale Converter with Steps

1. How do you calculate paper size?

For A series of paper size conversion calculations, check out the manual process on our page and use this free online paper size converter calculator.

2. Can you change the paper size when printing?

Yes, Click on Printer properties, then click on the Paper tab, and then choose the paper size you want to use in the Paper Size box.

3. What is the ratio for A4?

The width & height ratio for A4 is 1:√2 (1:1.4142).

4. What are the different sizes of paper?

The several different sizes of paper most commonly taken in size are:

  • Letter – 8.5” x 11”
  • Tabloid – 11” x 17”
  • Digital Sizes – 12” x 18”, 13” x 19”, or 14” x 20”
  • Legal – 8.5” x 14”