Print calculators: paper weights, spine width and sheets per run

Three quick calculators for planning a job. They work from what you type; nothing is saved or sent.

• Paper weights in both units. US paper weights (such as 80 lb text or 100 lb cover) beside grams per square metre (gsm), for either direction. Text and cover weights are measured on different sheet sizes, so choose the grade first.
• Spine width. Enter the inside page count and choose the paper to see how thick a perfect-bound book’s spine will be, so the cover art can be sized right first time.
• Pieces per sheet. Enter the finished size and a press sheet size to see how many fit on a sheet, and how many sheets a quantity needs.

They’re planning figures: our prepress team confirms the spine and the layout on every job before it prints.