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Molar to Percentage Calculator

Convert molarity to percentage concentration easily with our Molar to Percentage Calculator. Accurate results for chemistry and lab solutions in seconds!

mol/L
g/mol
g/mL
Optional - for reference only
Optional - for solute mass calculation

If you're working in a lab, studying chemistry, or preparing chemical solutions, you'll often need to convert molarity (mol/L) into percentage concentration (% w/v or % w/w). While these units describe the concentration of a solution, they serve different purposes and are used in different types of measurements. To make your task easier, we've developed an accurate and easy-to-use Molar to Percentage Calculator. This tool is perfect for students, chemists, pharmacists, or anyone dealing with chemical formulations.

What is Molar to Percentage Conversion?

Molarity (mol/L) measures how many moles of solute are present in one liter of solution.

Percentage concentration (% w/v) refers to how many grams of solute are present per 100 mL of solution.

To convert from molarity to percentage, you need to know the molecular weight (molar mass) of the substance.

For example, 1 M solution of NaCl (molecular weight = 58.44 g/mol) means 58.44 grams of NaCl are dissolved in 1 liter of solution. To find the percentage, we scale it to 100 mL.

How to Convert Molarity to Percentage

Here's the basic formula:

% (w/v) = Molarity (mol/L) × Molar Mass (g/mol) ÷ 10

Explanation:

  • Molarity gives you grams per 1000 mL.
  • Percentage is based on grams per 100 mL.
  • So we divide by 10 to scale from 1000 mL to 100 mL.

Example Calculation:

Let’s say you have a 2 M solution of NaCl (molecular weight = 58.44 g/mol):

% = 2 × 58.44 ÷ 10 = 11.688%

So a 2 M NaCl solution is equal to approximately 11.69% w/v.

How to Use the Molar to Percentage Calculator

Our calculator simplifies this entire process. Here’s how you can use it:

  1. Enter the molarity of your solution (in mol/L).
  2. Enter the molar mass of the compound (in g/mol).
  3. Click "Calculate".
  4. Instantly get the result in percentage concentration (% w/v).

The tool helps remove human error and gives you quick, reliable results whether you're in the lab or working on a chemistry assignment.

Related Conversions

This calculator is especially helpful when converting between other concentration units:

Convert % to Molarity:

Molarity = (% w/v × 10) ÷ Molar Mass

Convert mmol/L to %:

% = (mmol/L × Molar Mass) ÷ 10,000

Convert mg/mL to Molarity:

Molarity = (mg/mL ÷ Molar Mass) × 1000

These conversions are essential in chemistry, pharmacy, biology, and environmental science.

Final Verdict

If you regularly work with chemical solutions, our Molar to Percentage Calculator is the tool you need. It saves time, ensures accuracy, and helps you understand the relationship between molarity and percentage concentration. No more manual calculations or complex formula memorization just enter your values and get instant results.

Whether you are a student, teacher, researcher, or lab technician, this calculator brings speed and precision to your chemical concentration conversions.

FAQs

How do you convert molar to percentage?

Use this formula:

% (w/v) = Molarity × Molar Mass ÷ 10

Can you convert moles to percent?

Yes. First, convert moles to grams using molar mass. Then, use the total solution volume to find the percentage.

What is w/v in percentage?

W/v stands for weight/volume percentage. It represents the number of grams of solute per 100 mL of solution.

How to find %(m/m)?

Mass percent (% m/m) = (mass of solute ÷ mass of solution) × 100

What is the difference between molarity and percentage?

Molarity is moles per liter, a molecular count, while percentage is based on mass per 100 mL or g per 100 g, depending on the context.