Print Production Lab - Free calculators for print, prepress, and production

I built Print Production Lab because many useful commercial-print calculations are scattered across spreadsheets, reference sheets, and isolated tools with little explanation. The goal was to create one practical, free resource for estimators, prepress operators, print buyers, and production teams. The site now includes 36 calculators covering paper, imposition, binding, resolution, roll media, costs, and production time. I also wanted the tools to explain more than a final number, so each calculator includes guidance for choosing inputs, a worked example, result interpretation, production assumptions, limitations, and links to related guides and references. Feedback on missing workflows, unclear inputs, or real-world production cases would be especially helpful.