https://publishing.co.uk/tools/Recent content in Free KDP Tools & Calculators on publishing.co.uk — Professional KDP Book FormattingHugoen-gbWed, 18 Mar 2026 00:00:00 +0000https://publishing.co.uk/tools/kdp-margin-calculator/Wed, 18 Mar 2026 00:00:00 +0000https://publishing.co.uk/tools/kdp-margin-calculator/<h2 id="kdp-margin-calculator">KDP Margin Calculator</h2> <p><em>This interactive tool will calculate the exact margins required for your KDP paperback to pass automated review.</em></p> <div style="background:#f1f5f9; padding:2rem; border-radius:8px; margin:2rem 0; border:1px solid var(--border);"> <form id="margin-calc" style="max-width:400px; margin:0 auto;"> <div style="margin-bottom:1rem;"> <label style="display:block; margin-bottom:.5rem; font-weight:600;">Estimated Page Count:</label> <input type="number" id="page-count" value="200" style="width:100%; padding:.75rem; border:1px solid var(--border); border-radius:4px; font-family:inherit;"> </div> <div style="margin-bottom:1rem;"> <label style="display:block; margin-bottom:.5rem; font-weight:600;">Trim Size:</label> <select id="trim-size" style="width:100%; padding:.75rem; border:1px solid var(--border); border-radius:4px; font-family:inherit; background:#fff;"> <option value="6x9">6 x 9 inches</option> <option value="5x8">5 x 8 inches</option> <option value="5.5x8.5">5.5 x 8.5 inches</option> </select> </div> <button type="button" class="btn btn--primary" style="width:100%; justify-content:center;" onclick="calculateMargins()">Calculate Margins</button> </form> <div id="calc-results" style="display:none; margin-top:2rem; padding-top:2rem; border-top:1px solid var(--border);"> <h4 style="text-align:center; margin-bottom:1rem;">Required Margins</h4> <div style="display:grid; grid-template-columns:1fr 1fr; gap:1rem; text-align:center;"> <div style="background:#fff; padding:1rem; border-radius:4px; border:1px solid var(--border);"> <div style="font-size:.85rem; color:var(--muted); text-transform:uppercase;">Gutter (Inside)</div> <div id="res-gutter" style="font-size:1.5rem; font-weight:700; color:var(--indigo);">0.5"</div> </div> <div style="background:#fff; padding:1rem; border-radius:4px; border:1px solid var(--border);"> <div style="font-size:.85rem; color:var(--muted); text-transform:uppercase;">Outside / Top / Bottom</div> <div id="res-outside" style="font-size:1.5rem; font-weight:700; color:var(--indigo);">0.25" min</div> </div> </div> </div> </div> <script> function calculateMargins() { const pages = parseInt(document.getElementById('page-count').value) || 0; let gutter = '0.375"'; if (pages > 700) gutter = '0.875"'; else if (pages > 500) gutter = '0.75"'; else if (pages > 300) gutter = '0.625"'; else if (pages > 150) gutter = '0.5"'; document.getElementById('res-gutter').innerText = gutter; document.getElementById('calc-results').style.display = 'block'; } </script> <h3 id="how-kdp-margins-work">How KDP Margins Work</h3> <p>Amazon KDP requires specific margins to ensure your text isn't cut off during the printing and trimming process. The most critical margin is the <strong>gutter</strong> (the inside margin where the pages are bound to the spine).</p>https://publishing.co.uk/tools/trim-size-guide/Wed, 18 Mar 2026 00:00:00 +0000https://publishing.co.uk/tools/trim-size-guide/<h2 id="choose-the-right-trim-size">Choose the Right Trim Size</h2> <p>Your trim size dictates the physical dimensions of your printed book. Choosing the right size is crucial—it affects your page count, your printing costs, and how your book feels in a reader's hands.</p> <h3 id="standard-kdp-trim-sizes">Standard KDP Trim Sizes</h3> <table> <thead> <tr> <th>Trim Size (Inches)</th> <th>Trim Size (mm)</th> <th>Best For</th> </tr> </thead> <tbody> <tr> <td><strong>5&quot; x 8&quot;</strong></td> <td>127 x 203 mm</td> <td>Novellas, short memoirs, literary fiction.</td> </tr> <tr> <td><strong>5.5&quot; x 8.5&quot;</strong></td> <td>140 x 216 mm</td> <td>Trade paperbacks, standard fiction, narrative non-fiction.</td> </tr> <tr> <td><strong>6&quot; x 9&quot;</strong></td> <td>152 x 229 mm</td> <td><strong>Industry Standard.</strong> Thrillers, sci-fi, fantasy, business books.</td> </tr> <tr> <td><strong>7&quot; x 10&quot;</strong></td> <td>178 x 254 mm</td> <td>Workbooks, manuals, academic texts.</td> </tr> <tr> <td><strong>8&quot; x 10&quot;</strong></td> <td>203 x 254 mm</td> <td>Children's books, art books, large manuals.</td> </tr> <tr> <td><strong>8.5&quot; x 11&quot;</strong></td> <td>216 x 279 mm</td> <td>Textbooks, sheet music, coloring books.</td> </tr> </tbody> </table> <h3 id="how-trim-size-affects-cost">How Trim Size Affects Cost</h3> <p>Because KDP charges a flat per-page printing fee (after a certain threshold), a larger trim size usually results in a lower page count, which <em>can</em> reduce your printing costs and increase your royalties.</p>https://publishing.co.uk/tools/word-count-to-page-count/Wed, 18 Mar 2026 00:00:00 +0000https://publishing.co.uk/tools/word-count-to-page-count/<h2 id="estimate-your-page-count">Estimate Your Page Count</h2> <p>Knowing your approximate page count before you format is essential. It determines your gutter margin, your spine width, your printing cost, and ultimately your retail price.</p> <div style="background:#f1f5f9; padding:2rem; border-radius:8px; margin:2rem 0; border:1px solid var(--border);"> <form id="page-calc" style="max-width:400px; margin:0 auto;"> <div style="margin-bottom:1rem;"> <label style="display:block; margin-bottom:.5rem; font-weight:600;">Word Count:</label> <input type="number" id="word-count" value="60000" style="width:100%; padding:.75rem; border:1px solid var(--border); border-radius:4px; font-family:inherit;"> </div> <div style="margin-bottom:1rem;"> <label style="display:block; margin-bottom:.5rem; font-weight:600;">Trim Size:</label> <select id="trim" style="width:100%; padding:.75rem; border:1px solid var(--border); border-radius:4px; font-family:inherit; background:#fff;"> <option value="250">6 x 9 inches (~250 words/page)</option> <option value="200">5 x 8 inches (~200 words/page)</option> <option value="225">5.5 x 8.5 inches (~225 words/page)</option> <option value="300">7 x 10 inches (~300 words/page)</option> </select> </div> <button type="button" class="btn btn--primary" style="width:100%; justify-content:center;" onclick="estimatePages()">Estimate Pages</button> </form> <div id="page-results" style="display:none; margin-top:2rem; padding-top:2rem; border-top:1px solid var(--border); text-align:center;"> <div style="font-size:.85rem; color:var(--muted); text-transform:uppercase;">Estimated Page Count</div> <div id="res-pages" style="font-size:2.5rem; font-weight:800; color:var(--indigo);">240</div> <div id="res-spine" style="font-size:.9rem; color:var(--muted); margin-top:.5rem;">Estimated spine width: ~0.54"</div> </div> </div> <script> function estimatePages() { var words = parseInt(document.getElementById('word-count').value) || 0; var wpp = parseInt(document.getElementById('trim').value) || 250; var pages = Math.ceil(words / wpp) + 10; if (pages % 2 !== 0) pages++; var spine = (pages * 0.002252).toFixed(2); document.getElementById('res-pages').innerText = pages; document.getElementById('res-spine').innerText = 'Estimated spine width: ~' + spine + '"'; document.getElementById('page-results').style.display = 'block'; } </script> <h3 id="how-the-estimate-works">How the Estimate Works</h3> <p>The calculation uses industry-standard words-per-page averages for each trim size, then adds approximately 10 pages for front and back matter (title page, copyright, table of contents, and blank pages to ensure an even page count).</p>