Calculators
Free Book Publishing Calculators
Fast, private, browser-based tools — nothing you type leaves your device.
Spine Width & Cover Size Calculator
Calculate paperback spine width and full-wrap cover dimensions for any trim size, page count and paper — and download a cover template SVG.
Word Count to Page Count Calculator
Estimate how many printed pages your manuscript will be at any trim size and font size, plus spine width, reading time and audiobook length.
ISBN Converter, Validator & Hyphenator
Convert ISBN-10 to ISBN-13 and back, validate check digits and hyphenate any ISBN correctly using the official International ISBN Agency ranges.
ISBN Barcode Generator (EAN-13 + Price Add-on)
Create a print-ready Bookland EAN-13 barcode for your ISBN with an optional 5-digit price add-on, and download it as a vector SVG.
Paper Size Converter (mm, Inches, Points, Pixels)
Convert paper and page sizes between millimetres, centimetres, inches, points and pixels at any DPI. Includes presets for A4, Letter and other standard sizes.
GSM to lb Paper Weight Converter
Convert paper weight between g/m² and US basis weights — bond, text (book), cover, index and bristol — with estimated thickness.
Image DPI & Print Size Calculator
Check whether an image is sharp enough to print: maximum print size at 300 dpi, pixels needed for a target size, and effective resolution.
Booklet Imposition Calculator
Get the page order for printing a saddle-stitched booklet or zine on a home or office printer: which pages go on the front and back of each sheet.
Book Weight & Shipping Calculator
Estimate the weight of a printed book and a whole shipment from trim size, page count, paper and cover stock.
Audiobook Length & Narration Calculator
Turn a word count into finished audiobook hours, studio time and narration cost at your quoted per-finished-hour (PFH) rate.
Book Margin & Gutter Calculator
Find the minimum inside (gutter) and outside margins for your page count, plus comfortable recommended margins and the resulting text block.