Molarity & Dilution Calculator: solutions, C1V1=C2V2, and serial dilutions

Make up any solution, fast

Three of the most-repeated bench calculations in one place: how much to weigh for a target molarity, the C₁V₁ = C₂V₂ dilution, and serial dilutions. Pick which quantity to solve for and the rest update instantly.

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What it does

• Molarity — mass = concentration × volume × MW. Enter a molecular weight and any two of mass / concentration / volume; solve for the third (e.g. NaCl, MW 58.44 → 2.922 g for 500 mL of 100 mM).
• Dilution — C₁V₁ = C₂V₂. Solve for any of the four, and it tells you how much diluent to add.
• Serial dilution — start concentration + fold + number of points → the full concentration ladder.

Every field has a unit selector (M/mM/µM/nM/pM, L/mL/µL, g/mg/µg/ng) and the beaker fills/colors to match volume and concentration.

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<div id="molarity-widget-embed"></div>

<script>
  // Optional: window.MOLARITY_THEME = "light";
</script>
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Credits

Built and maintained by 37degrees. Standard solution-prep math — no third-party libraries, no data leaves the browser.