Recipe Scaler

Scale any recipe up or down. Paste your ingredients and get perfectly adjusted amounts instantly.

Original Servings

Desired Servings

Paste Ingredients (one per line)

</div>
    <div class="result-box" style="text-align:left">
      <div class="label" style="margin-bottom:8px;font-weight:600;color:var(--accent);">Scaled to <span id="label">12</span> servings (x<span id="multiplier">3</span>):</div>
      <pre id="result" style="font-family:inherit;font-size:16px;white-space:pre-wrap;color:var(--text);margin:0;line-height:1.9;"></pre>
    </div>
    <button class="copy-btn" onclick="copyResult(this)" style="display:none;">Copy result</button>
  </div>
</div>

<div class="info-section">
  <h2>Tips for Scaling Recipes</h2>
  <h3>What scales linearly</h3>
  <p>Most ingredients scale perfectly: flour, sugar, butter, milk, vegetables, meat, and other main ingredients. Simply multiply by your scaling factor.</p>

<h3>What needs adjustment</h3>
  <p>Some ingredients don't scale perfectly at large multiples. Keep these in mind when doubling or tripling recipes:</p>
  <table class="info-table">
    <thead><tr><th>Ingredient</th><th>Guidance</th></tr></thead>
    <tbody>
      <tr><td>Salt & spices</td><td>Start with 75% of the scaled amount, then taste and adjust</td></tr>
      <tr><td>Leavening (baking powder/soda)</td><td>Use 75-80% of the scaled amount to avoid off-tastes</td></tr>
      <tr><td>Eggs</td><td>Scale exactly — round to the nearest whole egg</td></tr>
      <tr><td>Cooking time</td><td>Doesn't usually change (it's about thickness, not volume)</td></tr>
      <tr><td>Pan size</td><td>Use a larger pan, or bake in batches — don't overfill</td></tr>
    </tbody>
  </table>

<h2>Common Scaling Factors</h2>
  <table class="info-table">
    <thead><tr><th>From</th><th>To</th><th>Factor</th></tr></thead>
    <tbody>
      <tr><td>Serves 4</td><td>Serves 2</td><td>x 0.5 (halve)</td></tr>
      <tr><td>Serves 4</td><td>Serves 6</td><td>x 1.5</td></tr>
      <tr><td>Serves 4</td><td>Serves 8</td><td>x 2 (double)</td></tr>
      <tr><td>Serves 4</td><td>Serves 12</td><td>x 3 (triple)</td></tr>
      <tr><td>Serves 6</td><td>Serves 4</td><td>x 0.67</td></tr>
      <tr><td>Serves 8</td><td>Serves 2</td><td>x 0.25 (quarter)</td></tr>
    </tbody>
  </table>
</div>

<div class="related">
  <h2>Related Tools</h2>
  <div class="related-grid">
    <a class="related-card" href="cups-to-grams.html"><h3>Cups to Grams</h3><p>Convert measurements by ingredient</p></a>
    <a class="related-card" href="pan-size-converter.html"><h3>Pan Size Converter</h3><p>Adjust for different pan sizes</p></a>
    <a class="related-card" href="ingredient-substitution.html"><h3>Substitution Finder</h3><p>Find ingredient alternatives</p></a>
  </div>
</div>

</main>
<footer>
  <div class="footer-links">
    <a href="index.html">All Tools</a>
    <a href="cups-to-grams.html">Cups to Grams</a>
    <a href="air-fryer-converter.html">Air Fryer Converter</a>
    <a href="temperature-converter.html">Temperature</a>
  </div>
  <p>© 2026 CookCalculator.net — Free kitchen calculators & converters.</p>
</footer>

function parseFraction(str) {
  str = str.trim();
  // Handle mixed numbers like "1 1/2"
  const mixed = str.match(/^(\d+)\s+(\d+)\/(\d+)$/);
  if (mixed) return parseFloat(mixed[1]) + parseFloat(mixed[2]) / parseFloat(mixed[3]);
  // Handle fractions like "1/2"
  const frac = str.match(/^(\d+)\/(\d+)$/);
  if (frac) return parseFloat(frac[1]) / parseFloat(frac[2]);
  // Handle decimals
  return parseFloat(str);
}