@Rakesh Bhardwaj Tried the script with the gloss paper setting and it calculates the spine width pretty accurately for my print job. However, when I switched to matt, the thickness seemed slightly off compared to physical measurements—might be due to how the script handles paper compression. Still great for a quick estimate though!

@Rakesh Bhardwaj Just a quick note: when calculating the spine width, make sure you’re using the correct paper thickness, not just grammage. Grammage measures weight per area, but thickness varies even within the same grammage depending on paper type. Also, double-check that your script accounts for any extra allowances needed for swelling in certain bindings like perfect bound versus stitched. Otherwise, looks handy!