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  <!-- Homepage -->
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    <loc>https://digikalc.com/</loc>
    <lastmod>2025-10-26</lastmod>
    <changefreq>weekly</changefreq>
    <priority>1.0</priority>
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    <xhtml:link rel="alternate" hreflang="es-ES" href="https://digikalc.com/?lang=es-ES"/>
  </url>
  
  <!-- Lei de Ohm Calculator -->
  <url>
    <loc>https://digikalc.com/tools/ohms-law.html</loc>
    <lastmod>2025-10-26</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
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    <xhtml:link rel="alternate" hreflang="en-US" href="https://digikalc.com/tools/ohms-law.html?lang=en-US"/>
    <xhtml:link rel="alternate" hreflang="es-ES" href="https://digikalc.com/tools/ohms-law.html?lang=es-ES"/>
  </url>
  
  <!-- Engine Displacement Calculator -->
  <url>
    <loc>https://digikalc.com/tools/engine-displacement.html</loc>
    <lastmod>2025-10-26</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="pt-BR" href="https://digikalc.com/tools/engine-displacement.html?lang=pt-BR"/>
    <xhtml:link rel="alternate" hreflang="en-US" href="https://digikalc.com/tools/engine-displacement.html?lang=en-US"/>
    <xhtml:link rel="alternate" hreflang="es-ES" href="https://digikalc.com/tools/engine-displacement.html?lang=es-ES"/>
  </url>
  
  <!-- Transmission Ratio Calculator -->
  <url>
    <loc>https://digikalc.com/tools/transmission-ratio.html</loc>
    <lastmod>2025-11-04</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="pt-BR" href="https://digikalc.com/tools/transmission-ratio.html?lang=pt-BR"/>
    <xhtml:link rel="alternate" hreflang="en-US" href="https://digikalc.com/tools/transmission-ratio.html?lang=en-US"/>
    <xhtml:link rel="alternate" hreflang="es-ES" href="https://digikalc.com/tools/transmission-ratio.html?lang=es-ES"/>
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