I am an artist and I have recently become very interested in Josef Muller-Brockman's grid systems however I am very new to this sort of system and would like to better understand the math at work in the construction of the grids so that I can construct a 20 cell grid for a page that is the golden ratio (ie. the height is 1.618 * the width).

I am using the 20 grid on page 77 of Josef Muller-Brockman's Grid Systems in Graphic Design as a reference, however the page the book is printed on is not exactly a golden ratio, nor is the grid area a true golden ratio.

Please forgive me if any of this is rudimentary as I have never dealt with anything like this since high school geometry, but does anybody have any idea how I would go about constructing a similar grid in Indesign where the page is a golden ratio, and so is the bounding box of the grid?

I have included a scan of page 77 from the Josef Muller-Brockman book.

Any suggestions would be greatly appreciated

Thanks so much!

ps. Please let me know if there is any other information or any files i could provide that would be helpful

The simplest way to do this would be to open your JPG in Photoshop, crop the extra white space around the grid from the image, then resize the image--de-selecting "Constrain Proportions"--to 1000px wide × 1168px high. Then, place the image in InDesign, resize it--proportionally this time--to fit your page, then use it as a template to create your guidelines. Delete the JPG, make this page a master, and you're all set.

^ he means 1618 px high.

Keep in mind that you can round the golden ratio to 1.6 or 1.625 to make measurements easier. Although the golden ratio resides at 1:1.618, a near-enough estimate still achieves the intended goal.

You might find this useful: http://font.is/?p=1459 Easy Grid Calculator is an online calculator for grids. Helps you to calculate rows, columns... all the stuff.