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Cover spread size calculator

Calculate full cover spread size including spine and bleed.

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About this tool

Cover spread size calculator is a free online utility from BlueprintLab Tools. Calculate full cover spread size including spine and bleed.

Useful for calculations and checks related to books, creator events, Artist Alley preparation, inventory, and sales.

No account is required. The tool is designed to complete the task directly in your browser with a short input → process → result flow.

How to use

  1. Enter or choose trim width (mm).
  2. Enter or choose trim height (mm).
  3. Run the tool and review, copy, or use the result.

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