Calculating Image Resolution August 29, 2017, 09:21:12 PM I'm currently working on a large format poster job and was asked to calculate the resolutions of the placed images to report back to the customer how bad they are going to look. Most images are placed at 150% or higher into an InDesign file then output from there. Does anyone know a formula for figuring this out? I'm thinking something like: original resolution / scale maybe? Thanks!