mini-tools.uk/unit.html at main · knsjd25/mini-tools.uk · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width,initial-scale=1" />

  <title id="meta-title">Free Unit Converter | Metric to Imperial & Temperature — Mini-Tools</title>
  <meta name="description" id="meta-desc" content="Convert between metric and imperial units instantly. Free online tool for length (m to ft), weight (kg to lbs), temperature (C to F), and volume. No sign-up, privacy-first." />
  <meta name="keywords" content="unit converter online, metric to imperial, meters to feet, kg to lbs, celsius to fahrenheit, volume converter, free conversion tool" />
  <link rel="canonical" href="https://mini-tools.uk/unit.html" />

  <link rel="alternate" hreflang="en" href="https://mini-tools.uk/unit.html?lang=en" />
  <link rel="alternate" hreflang="zh-Hans" href="https://mini-tools.uk/unit.html?lang=zh" />
  <link rel="alternate" hreflang="es" href="https://mini-tools.uk/unit.html?lang=es" />
  <link rel="alternate" hreflang="fr" href="https://mini-tools.uk/unit.html?lang=fr" />
  <link rel="alternate" hreflang="de" href="https://mini-tools.uk/unit.html?lang=de" />

  <script type="application/ld+json">
  {
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    "@type": "SoftwareApplication",
    "name": "Mini-Tools Unit Converter",
    "operatingSystem": "Web",
    "applicationCategory": "UtilitiesApplication",
    "description": "Instant unit conversion between metric and imperial systems for length, weight, temperature, and volume.",
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    .unit-input-card:focus-within { border-color: #4f46e5; box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.05); }
    input::-webkit-outer-spin-button, input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
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    <header class="mb-10 text-center">
      <h1 id="page-title" class="text-4xl lg:text-5xl font-extrabold text-slate-900 mb-4 tracking-tight">
        Universal Unit Converter
      </h1>
      <p id="page-desc" class="text-lg text-slate-500 max-w-2xl mx-auto">
        Switch between Metric and Imperial systems instantly. Accurate, fast, and secure.
      </p>
    </header>

    <div class="grid grid-cols-1 gap-8 mb-16">
      <div class="bg-white p-8 rounded-3xl border border-slate-100 shadow-sm space-y-8">

        <div class="flex flex-wrap justify-center gap-3 border-b border-slate-100 pb-8">
          <button onclick="setCategory('length', this)" class="cat-btn px-5 py-2.5 rounded-xl bg-blue-600 text-white font-bold text-sm shadow-lg shadow-blue-100" id="btn-length">Length</button>
          <button onclick="setCategory('weight', this)" class="cat-btn px-5 py-2.5 rounded-xl bg-slate-100 text-slate-600 font-bold text-sm" id="btn-weight">Weight</button>
          <button onclick="setCategory('temp', this)" class="cat-btn px-5 py-2.5 rounded-xl bg-slate-100 text-slate-600 font-bold text-sm" id="btn-temp">Temp</button>
          <button onclick="setCategory('volume', this)" class="cat-btn px-5 py-2.5 rounded-xl bg-slate-100 text-slate-600 font-bold text-sm" id="btn-volume">Volume</button>
        </div>

        <div class="grid grid-cols-1 md:grid-cols-[1fr,auto,1fr] gap-6 items-center">
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            <div class="unit-input-card p-4 rounded-2xl">
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            </div>
            <select id="unit-from" onchange="convert()" class="w-full bg-slate-50 py-3 rounded-xl text-center font-bold text-slate-600 outline-none cursor-pointer border border-slate-100"></select>
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          <button onclick="swapUnits()" class="p-4 bg-slate-900 hover:scale-110 text-white rounded-full transition-all shadow-xl active:scale-95">
            <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 7h12m0 0l-4-4m4 4l-4 4m0 6H4m0 0l4 4m-4-4l4-4" /></svg>
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              <div id="output-val" class="w-full text-3xl font-black text-white text-center overflow-hidden">0</div>
              <span class="absolute -top-2 -right-2 bg-yellow-400 text-[10px] font-black px-2 py-1 rounded-md opacity-0 group-hover:opacity-100 transition-opacity">CLICK TO COPY</span>
            </div>
            <select id="unit-to" onchange="convert()" class="w-full bg-slate-50 py-3 rounded-xl text-center font-bold text-slate-600 outline-none cursor-pointer border border-slate-100"></select>
          </div>
        </div>

        <div id="formula-box" class="p-5 bg-blue-50/50 rounded-2xl text-center text-sm font-bold text-blue-600 border border-blue-100">
          Calculation formula will appear here.
        </div>
      </div>
    </div>

    <article class="prose max-w-none border-t border-slate-200 pt-16">
      <div id="seo-en">
        <h2>Metric vs. Imperial: Why do we need conversion?</h2>
        <p>While most of the world uses the <strong>Metric system</strong> (meters, kilograms, liters), the <strong>Imperial system</strong> (inches, pounds, gallons) is still widely used in the USA and for certain applications in the UK. Our <strong>online unit converter</strong> helps you bridge this gap instantly.</p>

        <div class="grid grid-cols-1 md:grid-cols-2 gap-8 my-8">
          <div class="bg-white p-6 rounded-2xl border border-slate-100">
            <h3 class="mt-0">Popular Length Conversions</h3>
            <ul class="text-sm space-y-2">
              <li>• 1 Meter to Feet = 3.2808 ft</li>
              <li>• 1 Inch to Centimeters = 2.54 cm</li>
              <li>• 1 Mile to Kilometers = 1.6093 km</li>
            </ul>
          </div>
          <div class="bg-white p-6 rounded-2xl border border-slate-100">
            <h3 class="mt-0">Popular Weight Conversions</h3>
            <ul class="text-sm space-y-2">
              <li>• 1 Kilogram to Pounds = 2.2046 lb</li>
              <li>• 1 Ounce to Grams = 28.3495 g</li>
              <li>• 1 Stone to Kilograms = 6.3503 kg</li>
            </ul>
          </div>
        </div>

        <h3>Temperature Conversion: Celsius to Fahrenheit</h3>
        <p>Converting temperature is unique because it's not just a simple multiplier. The formula for <strong>Celsius to Fahrenheit</strong> is $(^\circ C \times 9/5) + 32$. Our tool handles these complex calculations for you, including <strong>Kelvin</strong> for scientific needs.</p>
      </div>

      <div id="seo-zh" style="display: none;">
        <h2>为什么需要单位换算？</h2>
        <p>全球大部分地区使用<strong>公制单位</strong>（米、千克、升），但在美国和英国的部分领域，<strong>英制单位</strong>（英寸、磅、加仑）依然非常普遍。Mini-Tools.uk 提供的<strong>在线单位换算器</strong>能帮您秒速完成转换。</p>
        <h3>常见换算公式</h3>
        <ul>
          <li><strong>长度</strong>：1 米 (m) ≈ 3.28 英尺 (ft)</li>
          <li><strong>重量</strong>：1 千克 (kg) ≈ 2.2 磅 (lb)</li>
          <li><strong>温度</strong>：华氏度 (°F) = (摄氏度 × 9/5) + 32</li>
        </ul>
        <p>我们的工具完全免费，隐私安全，所有计算均在您的浏览器本地完成。</p>
      </div>
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  <script>
    const i18n = {
      en: {
        metaTitle: "Free Unit Converter | Metric to Imperial & Temp — Mini-Tools",
        metaDesc: "Convert length, weight, and temperature instantly. Free metric to imperial converter for meters to feet, kg to lbs, Celsius to Fahrenheit.",
        title: "Universal Unit Converter", desc: "Metric & Imperial quick swap.",
        length: "Length", weight: "Weight", temp: "Temp", volume: "Volume",
        units: {
          m: "Meters (m)", km: "Kilometers (km)", ft: "Feet (ft)", in: "Inches (in)", mi: "Miles (mi)", cm: "Centimeters (cm)",
          kg: "Kilograms (kg)", g: "Grams (g)", lb: "Pounds (lb)", oz: "Ounces (oz)", st: "Stone (st)",
          c: "Celsius (°C)", f: "Fahrenheit (°F)", k: "Kelvin (K)",
          l: "Liters (L)", ml: "Milliliters (ml)", gal: "Gallons (US)", floz: "Fluid Ounces (oz)"
        }
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        metaTitle: "单位换算器 | 公制英制转换 & 温度换算 — Mini-Tools",
        metaDesc: "即时转换长度、重量和温度。免费公制转英制工具，支持米转英尺、千克转磅、摄氏度转华氏度。",
        title: "万能单位换算器", desc: "公制与英制单位快速转换。",
        length: "长度", weight: "重量", temp: "温度", volume: "体积",
        units: {
          m: "米 (m)", km: "千米 (km)", ft: "英尺 (ft)", in: "英寸 (in)", mi: "英里 (mi)", cm: "厘米 (cm)",
          kg: "千克 (kg)", g: "克 (g)", lb: "磅 (lb)", oz: "盎司 (oz)", st: "英石 (st)",
          c: "摄氏度 (°C)", f: "华氏度 (°F)", k: "开尔文 (K)",
          l: "升 (L)", ml: "毫升 (ml)", gal: "加仑 (美)", floz: "液量盎司"
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    };

    const conversionRates = {
      length: { m: 1, km: 1000, ft: 0.3048, in: 0.0254, mi: 1609.34, cm: 0.01 },
      weight: { kg: 1, g: 0.001, lb: 0.453592, oz: 0.0283495, st: 6.35029 },
      volume: { l: 1, ml: 0.001, gal: 3.78541, floz: 0.0295735 }
    };

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      else if (f === 'f') c = (v - 32) * 5/9;
      else if (f === 'k') c = v - 273.15;

      if (t === 'c') return c;
      if (t === 'f') return (c * 9/5) + 32;
      if (t === 'k') return c + 273.15;
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      const to = document.getElementById('unit-to');
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      document.getElementById('btn-length').innerText = data.length;
      document.getElementById('btn-weight').innerText = data.weight;
      document.getElementById('btn-temp').innerText = data.temp;
      document.getElementById('btn-volume').innerText = data.volume;

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</body>
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