<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9
        http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">

  <!-- ── LIVE PAGES ONLY (never list pages that return 404) ── -->

  <!-- Main App Hub -->
  <url>
    <loc>https://aionlinecalculator.com/</loc>
    <lastmod>2026-03-22</lastmod>
    <changefreq>weekly</changefreq>
    <priority>1.0</priority>
  </url>

  <!-- Discipline Hubs (live .html files) -->
  <url>
    <loc>https://aionlinecalculator.com/electrical.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/mechanical.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/civil.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/chemical.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/physics.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/converter.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/financial.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/health.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/programmer.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- Standalone Calculator Pages (live) -->
  <url>
    <loc>https://aionlinecalculator.com/cable-sizing-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/ohms-law-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/voltage-drop-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/concrete-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/retaining-wall-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/3-phase-power-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/voltage-divider-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/beam-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/pipe-sizing-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/power-factor-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/transformer-sizing-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/hvac-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/projectile-motion-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/short-circuit-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/bjt-transistor-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/conduit-fill-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/heat-exchanger-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/chemical-dosing-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/cable-sizing-guide.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/engineering-formulas.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/best-engineering-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>

  <!-- Additional standalone calculator pages -->
  <url>
    <loc>https://aionlinecalculator.com/rebar-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/led-resistor-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/motor-starting-current-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>

  <!-- NOTE: Add new URLs here ONLY after the page is live and returns 200 OK -->
  <!-- Do NOT list noindex or redirect pages (motor-sizing-calculator.html, subdirectory stubs) -->


  <!-- New calculator pages added 2026-03-21 -->
  <url>
    <loc>https://aionlinecalculator.com/bmi-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/calorie-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/ideal-weight-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/bmr-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/body-fat-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/percentage-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/age-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/fraction-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/gpa-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/compound-interest-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/loan-emi-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/tip-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/discount-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/resistor-color-code-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/rc-time-constant-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/op-amp-gain-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/555-timer-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/torque-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/gear-ratio-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/reynolds-number-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/pump-head-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/molarity-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/ph-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/kinetic-energy-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>
  <url>
    <loc>https://aionlinecalculator.com/simple-pendulum-calculator.html</loc>
    <lastmod>2026-03-21</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.90</priority>
  </url>

</urlset>
