Moles Calculator

The Moles Calculator allows users to calculate the number of moles, molecules, solution volume, and solution concentration based on input values for molar mass, mass, concentration, and volume.

Use Our Moles Calculator

How to Use the Moles Calculator

The Moles Calculator is designed to help you calculate the number of moles, number of molecules, solution volume, and solution concentration from given inputs such as molar mass, mass in grams, concentration, and volume. Follow these steps to effectively use the calculator.

Step 1: Input Molar Mass

  • Locate the Molar Mass field: This field requires you to enter the molar mass of the substance in grams per mole (g/mol).
  • Enter the Molar Mass: The molar mass is a required input and must be greater than or equal to 0.001 g/mol. Use increments of 0.001 for precision.

Step 2: Input Mass in Grams

  • Locate the Mass field: Enter the mass of the substance in grams.
  • Enter the Mass: This input is required. You must enter a value greater than or equal to 0. The allowable step increment is 0.001 g for accuracy.

Step 3: Optionally Input Concentration

  • Locate the Concentration field: This optional field is used if you already know the concentration of your solution in mol/L.
  • Enter the Concentration: If provided, the value must be zero or greater, using a step size of 0.001 mol/L.

Step 4: Optionally Input Volume

  • Locate the Volume field: This is another optional field for entering the volume of the solution in liters.
  • Enter the Volume: Enter a volume that is zero or greater, using increments of 0.001 L.

Step 5: Review Results

After providing the necessary inputs, the calculator will compute several useful outputs, which include the following.

  • Number of Moles: The calculator uses the formula massGrams / moleMass and returns the number of moles with four decimal places, displayed in mol.
  • Number of Molecules: The result is calculated using (massGrams / moleMass) * 6.02214076e23 and displayed in terms of molecules to two decimal places.
  • Solution Volume: If the concentration is provided, the volume is calculated using moles / concentration and is shown in liters with three decimal places.
  • Solution Concentration: If the solution volume is provided, the concentration is determined using moles / volume and shown in mol/L to three decimal places.