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Two print & publishing tools, side-by-side. See which fits your task.
Print & Publishing
Calculate book spine width from page count and paper thickness.
Open Spine WidthPrint & Publishing
Common book trim sizes with dimensions in inches and millimeters.
Open Trim SizesYour specific task is calculate book spine width from page count and paper thickness. Open the page, drop your input, get the result — typically under a second.
Your goal is common book trim sizes with dimensions in inches and millimeters. Same approach: paste in, get the result, move on. No account, no upload.
Both tools live in the same category, so the choice depends on the exact subtask. Spine Width focuses on calculate book spine width from page count and paper thickness; Trim Sizes focuses on common book trim sizes with dimensions in inches and millimeters. Try whichever description matches your goal more closely — they're both free.
Yes — both tools are free for unlimited personal use. The Pro plan unlocks higher limits and batch features but the core functionality stays free forever.
Absolutely. Many users chain multiple tools together — process a file with one, then feed the result into another. Nothing is uploaded, so chaining is essentially instant.
No. Both Spine Width and Trim Sizes work without signup. We only ask for an email if you decide to subscribe to a paid plan.