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Molarity To Percent Calculator

Work out molarity to percent instantly with clear inputs, formula shown and shareable results.

About Molarity To Percent Calculator

Molarity converts to percentage in two steps: multiply by molar mass to get grams per litre, then divide by ten for percent weight in volume. Percent weight in weight also needs the solution density. One molar sodium chloride is 58.44 g/L, so 5.84% w/v but only 5.62% w/w at a density of 1.04 g/mL.

Formulas

Grams per litre

g/L = molarity x molar mass

Percentages

%w/v = g/L / 10; %w/w = g/L / (density x 1000) x 100

Worked example

With the default values below, Molarity To Percent Calculator returns Percent Weight In Volume of 5.8440%. Change any input above and every figure here is recalculated in your browser.

Inputs used

Molarityminimum 0 mol/L
1 mol/L
Molar mass of the soluteminimum 0 g/mol
58.44 g/mol
Solution densityminimum 0 g/mL
1.04 g/mL

Results

Percent Weight In Volume
5.8440%
Percent Weight In Weight
5.6192%
Concentration
58.440 g/L
Grams Per 100 mL
5.8440

Step by step

  1. 1Values used
  2. 2Grams per litre
  3. 3Percentages
  4. 4Percent Weight In Volume= 5.8440
  5. 5Percent Weight In Weight= 5.6192
  6. 6Concentration= 58.440 g/L
  7. 7Grams Per 100 mL= 5.8440

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why do w/v and w/w differ?

Because a litre of solution weighs more than a kilogram when the solute is dense. The difference grows with concentration.

Which does a pharmacopoeia mean by percent?

Usually w/v for liquids and w/w for solids and semi-solids, but it is always stated explicitly because the values diverge.

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