All Calculators Paperback Paperback With Inserts Paperback Spine Width CalculatorThis form calculates the width of the spine of a paperback book based on paper basis weight, page count, and allowance for the thickness of the cover. PagesTotal pages, including roman-numeraled frontmatter pages and blanks.Text paper40-lb. white, 688ppi45-lb. natural, 420ppi50-lb. white, 520ppi50-lb white 30% recycled, 596ppi55-lb. natural 100% recycled, 446ppi60-lb. white, 438ppi80-lb. white, 330ppi80-lb. natural, 328ppi100-lb. white, 266ppiCalculated spine width, fractionsNOTE: Fractions are rounded so may not match decimal values exactly, but will be well within the tolerance of binding equipment.Calculated spine width, decimal