Molarity Calculator

Calculate the molarity of a solution:

Solute Mass (g): Solution Volume (L):

What Is Molarity?

Molarity (M) is a unit of concentration that represents the number of moles of a solute in one liter of solution. It's commonly used in chemistry labs to measure how concentrated a substance is. Knowing the molarity helps ensure reactions proceed with the correct stoichiometry.

What is Molarity Calculator?

A molarity calculator helps you determine the concentration of a solution by calculating the number of moles of solute per liter of solution. Molarity calculator simplifies chemistry calculations by allowing you to find molarity, mass, or volume based on the values you have.

Molarity Formula

The basic formula for molarity is:

M = moles of solute/liters of solution

To calculate moles, use:

Moles = mass (g) / molecular weight (g/mol)

Then plug that into the molarity formula.

How to Use the hcalculator’s Molarity Calculator?

The molarity calculator on hcalculator is designed to simplify your chemistry tasks. You can input any of the following combinations:

Molarity + Volume + Molecular Weight → Mass
Mass + Volume + Molecular Weight → Molarity
Molarity + Mass + Molecular Weight → Volume

This makes it a versatile tool whether you’re prepping for a titration, diluting a solution, or doing lab research.

Example: To prepare a 1M solution of NaCl (MW = 58.44 g/mol) in 1 liter of water:

M = 1 mol/L

mass = M × MW × volume = 1 × 58.44 × 1 = 58.44g

So, you’ll need 58.44g of NaCl.

What Is a Mole?

A mole is a standard unit in chemistry representing 6.022 × 10^23 particles (Avogadro’s number). When you calculate moles using a molarity calculator, you’re finding how many particles are in your sample.

What Is Molecular Weight?

Molecular weight (MW) is the sum of the atomic weights of all atoms in a molecule. It's usually expressed in g/mol and is essential in converting mass to moles. Make sure to enter the batch-specific MW from your chemical's label.

Titration and Molarity

Titration is a method used to find the concentration of a solute in a solution. The molarity of the titrant (known concentration) reacts with the analyte (unknown concentration) to complete the reaction. You can calculate either concentration using the calculator by plugging in values.

Titration formula:

M1V1 = M2V2

Where:

M1 = molarity of first solution
V1 = volume of first solution
M2 = molarity of the second solution
V2 = volume of the second solution

How to Dilute a Solution?

To dilute a stock solution, you can use the same formula: M1V1 = M2V2

Example: To make 500 mL of 0.1M NaOH from a 1M stock:

M1 = 1M, V1 =? M2 = 0.1M, V2 = 0.5L

V1 = (M2 × V2) / M1 = (0.1 × 0.5) / 1 = 0.05L = 50mL

So, mix 50 mL of 1M stock with 450 mL of water.

Use the calculator to avoid manual errors in such calculations.

Why Use hcalculator's Molarity Calculator?

Accurate and instant results
Handles molarity, mass, volume, and molecular weight
Perfect for students, chemists, and lab techs
molarity and dilution equations

Whether you're preparing buffer solutions or analyzing titration results, hcalculator makes complex calculations simple.

FAQs

What units should I use in the molarity calculator?

Use grams for mass, liters for volume, and g/mol for molecular weight.

Can I calculate volume if I only know molarity and mass?

Yes, just input those values into the tool and it’ll compute volume for you.

Does hcalculator work for dilution problems?

Absolutely. Use the M1V1 = M2V2 formula built into the calculator.

Final Thoughts

Whether you're working in a research lab, studying for an exam, or preparing chemical solutions, hcalculator is the tool you can trust. Fast, reliable, and easy to use—it makes chemistry more accessible for everyone.

Try the molarity calculator at hcalculator now and simplify your solution prep today!