25-02-20 - A-series Paper Sizes

Very Interesting...

If you take a sheet of A-series sized paper and fold it in half, the ratio of height to width remains the same.

To achieve this the ratio of height to width is height = sqrt(2) * width.

The size (area) of A0 is 1 square meter, A1 is 1/2 square meter, ..., A4 is 1/16 square meter.

There is A-1 (2 square meters), A-2 (4 square meters) etc.