Grid Calculator and New Guide Layout in Photoshop
My math is bad. Using a grid calculator makes my life easier! Once we enter our dimensions, I take this measurement and enter this in Photoshop. I go to the menu bar - view - new guide layout. And the guides will appear on your artboard as soon as you on the artboard; it goes away once you are not on the artboard. To hide these guides, clear them, under view - clear guides. If you need the guides again, only apply the new guide layout.
