# A4 Paper Dimensions

Paper can be measured in many different sizes and dimensions. Below are the most commonly used units when finding out the size of A4 sheet paper.

Select a unit type below to be taken to the corresponding page.

## Paper Size Dimensions in:

 MM Inches CM Pixels

### Standard Paper Dimensions

All Dimensions of A series paper are units of the metric system and are most commonly used across the world in countries like India, Singapore, Germany, the UK and many more.

In the late 1700s, France was the first country to adopt the metric system and other countries followed in the 1900s. By the 20th century, most countries adopted metric as a standard.

However the United States and Canada have refused to use metric as a form of measurement for paper sizes. Most of the world uses the international standard of ISO 216 for paper sizes.

### Different Units of Measurement

The most commonly known units are millimetres, centimetres, metres and kilometres in metric. However, there are many other types of measurement used to measure length today. Some of these include:

• Inches - 1 Inch = 0.0254m
• Foot - 1 Foot = 0.3048m
• Yards - 1 Yard = 0.9144m
• Miles - 1 Mile = 1609.344m
• Fathom - 1 Fathom = 1.8m
• Shackle - 1 Shackle = 27.4m
• Cable - 1 Cable = 185.3m
• Nautical Mile - 1 Nautical Mile = 1852m

### What is an Inch of Measurement

The Imperial measurement system is based on dated methods of measurement. For example, the length of 3 Barleycorns is equal to 1 inch. Seeing as Barleycorns can be different in dimensions, it was an unreliable method to measure the size of anything.

The standard of inches is now much more accurate, but is difficult to use compared to the centimetre or millimetre. This is the main reason so many countries have taken on the metric system.

Read this compressed version of how paper is made by A4PaperSize.org. Learn how paper goes from being a tree, to being a useful tool around the world...

Paper has a history nearly 2000 years old, but it took a long time to be known as we know paper today...

View the dimensions of A4 paper in pixels at different types PPI and DPI. Including Letter size and A4 paper for use in Photoshop at different dots/pixels per inch...

View the dimensions of A4 paper in inches for the UK, USA, Australia, Europe, Japan. Comparing the size of A4 paper to Letter size & what an Inch is...