Frequently asked questions

No. Every figure on PublishCalc comes from a documented estimate formula, not a live feed from any publishing platform. Rates, fees, and print costs are set by the platform you actually publish through and can change at any time — use these numbers to plan and compare, then confirm the final figures where you publish.

No. PublishCalc is an independent website. It is not affiliated with, endorsed by, or connected to Amazon KDP or any other publishing or print platform.

No. Every calculator runs entirely in your browser. There's no signup, no login, and nothing you enter is sent to a server.

No. Calculations happen locally in your browser tab and are not saved, transmitted, or logged. See the privacy page for details.

Books are printed at regional print facilities, and both the base cost and per-page rate differ by currency and region. That's why the print cost and royalty calculators both ask which marketplace you're pricing for.

In PublishCalc's model, not directly — page count and ink/interior type are the main print-cost drivers. Trim size matters more for layout planning, spine width, and how many pages your manuscript becomes.

Revenue is the full list price a customer pays. Royalty is what actually reaches you after the platform's cut and, for print books, the cost of printing the copy. The royalty and profit calculators on this site both estimate royalty, not revenue.

Front matter, chapter breaks, images, and the exact behavior of your typesetting software all shift the final page count. The word count to page count tool gives a planning range before you've formatted anything — treat the typical estimate as your working number.

No. Spine width depends on your final formatted page count and paper type, so treat the spine width calculator's output as a planning figure for cover design, and confirm it once your interior file is finished.