{"id":2392,"date":"2026-02-09T23:54:13","date_gmt":"2026-02-09T21:54:13","guid":{"rendered":"https:\/\/bio-me.bio\/?page_id=2392"},"modified":"2026-02-17T20:57:35","modified_gmt":"2026-02-17T18:57:35","slug":"dna-gc-content-calculator","status":"publish","type":"page","link":"https:\/\/bio-me.bio\/?page_id=2392","title":{"rendered":"DNA GC Content Calculator"},"content":{"rendered":"\n<div class=\"eco-tool wp-block-group\" id=\"eco-tool-gc-19b7e\">\n  <div class=\"eco-tool__header\">\n    <h2 class=\"eco-tool__title\">DNA GC Content Calculator<\/h2>\n    <p class=\"eco-tool__lead\">\n      Paste a DNA sequence (A, C, G, T). We\u2019ll calculate GC%, AT%, length, and nucleotide counts.\n    <\/p>\n  <\/div>\n\n  <form class=\"eco-tool__form\" id=\"eco-gc-form-19b7e\" novalidate>\n    <div class=\"eco-tool__grid2\">\n      <!-- Sequence -->\n      <div class=\"eco-tool__field eco-tool__field--wide\">\n        <label class=\"eco-tool__label\" for=\"eco-gc-seq-19b7e\">\n          DNA sequence (A, C, G, T)\n        <\/label>\n        <textarea class=\"eco-tool__textarea\" id=\"eco-gc-seq-19b7e\" rows=\"6\"\n          placeholder=\"Example: ATGCGTAACTG...\"><\/textarea>\n        <div class=\"eco-tool__hint\">We ignore spaces\/new lines and convert to uppercase.<\/div>\n      <\/div>\n\n      <!-- Options -->\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\">Tip<\/label>\n        <div class=\"eco-tool__noteBox\">\n          GC% can influence melting temperature and stability of DNA (simplified rule).\n        <\/div>\n        <div class=\"eco-tool__hint\">This tool checks only base letters.<\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"eco-tool__actions\">\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn\" id=\"eco-gc-calc-19b7e\">Calculate<\/button>\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn eco-tool__btn--ghost\" id=\"eco-gc-reset-19b7e\">Reset<\/button>\n      <div class=\"eco-tool__error\" id=\"eco-gc-error-19b7e\" aria-live=\"polite\"><\/div>\n    <\/div>\n  <\/form>\n\n  <div class=\"eco-tool__result\" id=\"eco-gc-result-19b7e\" hidden>\n    <h3 class=\"eco-tool__subtitle\">Results<\/h3>\n\n    <div class=\"eco-tool__cards\">\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">GC content<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-gc-gc-19b7e\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"eco-gc-at-19b7e\">\u2014<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Sequence length<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-gc-len-19b7e\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\">Valid bases counted<\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"eco-tool__card eco-tool__card--wide\">\n      <div class=\"eco-tool__metric-label\">Base counts<\/div>\n      <div class=\"eco-tool__metric-sub\" id=\"eco-gc-counts-19b7e\">\u2014<\/div>\n    <\/div>\n\n    <p class=\"eco-tool__note\">\n      Only A, C, G, T are counted. If your sequence includes other symbols (N, gaps, etc.), they are flagged as invalid.\n    <\/p>\n  <\/div>\n<\/div>\n\n<style>\n.eco-tool{border:1px solid rgba(0,0,0,.12);border-radius:12px;padding:16px}\n.eco-tool__grid2{display:grid;grid-template-columns:1fr;gap:16px}\n@media (min-width:860px){.eco-tool__grid2{grid-template-columns:2fr 1fr}}\n.eco-tool__field{display:flex;flex-direction:column;gap:6px}\n.eco-tool__field--wide{min-width:0}\n.eco-tool__label{font-weight:600}\n.eco-tool__textarea{\n  width:100%;\n  padding:10px 12px;\n  border:1px solid rgba(0,0,0,.2);\n  border-radius:10px;\n  background:#fff;\n  font:inherit;\n  box-sizing:border-box;\n  resize:vertical;\n}\n.eco-tool__hint{font-size:.92em;opacity:.78;min-height:38px}\n.eco-tool__noteBox{border:1px solid rgba(0,0,0,.12);border-radius:12px;padding:12px;background:rgba(0,0,0,.02);min-height:44px}\n\n.eco-tool__actions{display:flex;gap:10px;margin-top:16px;align-items:center;flex-wrap:wrap}\n.eco-tool__btn{padding:10px 22px}\n.eco-tool__btn--ghost{background:transparent!important;border:1px solid rgba(0,0,0,.2)!important}\n.eco-tool__btn--ghost:hover,.eco-tool__btn--ghost:focus{background:rgba(0,0,0,.06)!important;border-color:rgba(0,0,0,.35)!important}\n.eco-tool__error{font-weight:600;min-height:1.2em;flex:1 1 240px}\n\n.eco-tool__result{margin-top:16px}\n.eco-tool__subtitle{margin:0 0 10px}\n.eco-tool__cards{display:grid;gap:10px;grid-template-columns:1fr}\n@media (min-width:860px){.eco-tool__cards{grid-template-columns:1fr 1fr}}\n.eco-tool__card{border:1px solid rgba(0,0,0,.12);border-radius:12px;padding:12px}\n.eco-tool__card--wide{margin-top:10px}\n.eco-tool__metric-label{opacity:.85;font-weight:600}\n.eco-tool__metric-value{font-size:1.6em;font-weight:800;margin-top:6px;line-height:1.1}\n.eco-tool__metric-sub{opacity:.85;margin-top:6px}\n.eco-tool__note{margin-top:10px;opacity:.9}\n<\/style>\n\n<script>\n(function(){\n  const S=\"19b7e\";\n  const el=(id)=>document.getElementById(id+\"-\"+S);\n\n  const seqEl=el(\"eco-gc-seq\");\n  const calcBtn=el(\"eco-gc-calc\");\n  const resetBtn=el(\"eco-gc-reset\");\n  const errEl=el(\"eco-gc-error\");\n\n  const resEl=el(\"eco-gc-result\");\n  const gcEl=el(\"eco-gc-gc\");\n  const atEl=el(\"eco-gc-at\");\n  const lenEl=el(\"eco-gc-len\");\n  const countsEl=el(\"eco-gc-counts\");\n\n  function setError(msg){ errEl.textContent = msg || \"\"; }\n  function fmt(n,d){ return Number(n).toLocaleString(undefined,{maximumFractionDigits:d}); }\n\n  function calculate(){\n    setError(\"\");\n\n    const raw = (seqEl.value || \"\");\n    const cleaned = raw.replace(\/\\s+\/g,\"\").toUpperCase();\n\n    if (!cleaned){\n      setError(\"Please paste a DNA sequence first.\");\n      resEl.hidden = true;\n      return;\n    }\n\n    let A=0,C=0,G=0,T=0, invalid=0;\n\n    for (const ch of cleaned){\n      if (ch===\"A\") A++;\n      else if (ch===\"C\") C++;\n      else if (ch===\"G\") G++;\n      else if (ch===\"T\") T++;\n      else invalid++;\n    }\n\n    const total = A+C+G+T;\n\n    if (total === 0){\n      setError(\"No valid bases found. Use only A, C, G, T.\");\n      resEl.hidden = true;\n      return;\n    }\n\n    const gc = (G+C)\/total*100;\n    const at = (A+T)\/total*100;\n\n    gcEl.textContent = `${fmt(gc,2)}% GC`;\n    atEl.textContent = `${fmt(at,2)}% AT`;\n    lenEl.textContent = `${fmt(total,0)} bases`;\n\n    let extra = invalid > 0 ? ` | Invalid characters: ${fmt(invalid,0)}` : \"\";\n    countsEl.textContent = `A: ${fmt(A,0)}  \u2022  C: ${fmt(C,0)}  \u2022  G: ${fmt(G,0)}  \u2022  T: ${fmt(T,0)}${extra}`;\n\n    resEl.hidden = false;\n  }\n\n  function reset(){\n    seqEl.value = \"\";\n    setError(\"\");\n    resEl.hidden = true;\n  }\n\n  calcBtn.addEventListener(\"click\", calculate);\n  resetBtn.addEventListener(\"click\", reset);\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>DNA GC Content Calculator Paste a DNA sequence (A, C, G, T). We\u2019ll calculate GC%, AT%, length, and nucleotide counts. DNA sequence (A, C, G, T) We ignore spaces\/new lines&hellip;<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":2462,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":""},"_links":{"self":[{"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/pages\/2392"}],"collection":[{"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/bio-me.bio\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2392"}],"version-history":[{"count":2,"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/pages\/2392\/revisions"}],"predecessor-version":[{"id":2394,"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/pages\/2392\/revisions\/2394"}],"up":[{"embeddable":true,"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/pages\/2462"}],"wp:attachment":[{"href":"https:\/\/bio-me.bio\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2392"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}