Molecular Weight Calculator

Common Organic Compounds

Elements of the periodic table


Chemical formula:

# Atom Molar Mass (MM) Subtotal Mass Subtotal Mass
(g/mol) (%) (g/mol)

Total Molecular Weight:

Mole Calculator – Convert Grams, Moles, and Particles Easily

The Mole Calculator is a quick and efficient tool for converting between mass (grams), amount (moles), and number of particles using molar mass and Avogadro’s number. Whether you're a chemistry student or a researcher, this tool helps simplify your stoichiometric calculations.

How to Use the Mole Calculator

  1. Enter the known quantity (mass, moles, or particles)
  2. Enter the molar mass of the substance (g/mol)
  3. Select the conversion type
  4. Click “Calculate” to get the result

Mole Calculation Formulas

  • Grams to Moles: Moles = Mass (g) / Molar Mass (g/mol)
  • Moles to Grams: Mass (g) = Moles × Molar Mass (g/mol)
  • Moles to Particles: Particles = Moles × 6.022×10²³ (Avogadro’s Number)
  • Particles to Moles: Moles = Particles / 6.022×10²³

Example Calculation

Mass: 36g of water (H₂O)
Molar Mass: 18 g/mol

Moles: 36 ÷ 18 = 2 moles

Features of the Mole Calculator

  • Converts between grams, moles, and particles
  • Supports any chemical substance with known molar mass
  • Useful for lab experiments, homework, or chemical analysis
  • Quick and easy interface with instant results

Benefits of Using This Calculator

  • Eliminates manual conversion errors
  • Saves time during chemical computations
  • Ideal for students, chemists, and teachers
  • Supports accurate stoichiometric analysis

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FAQs About Mole Calculator

1. What is a mole in chemistry?

A mole is a standard unit that represents 6.022×10²³ particles (atoms, molecules, or ions) of a substance.

2. How do I calculate moles from grams?

Divide the mass in grams by the molar mass of the substance in g/mol.

3. What is molar mass?

Molar mass is the mass of one mole of a substance, measured in grams per mole (g/mol).

4. Can I convert molecules to grams?

Yes. First convert molecules to moles using Avogadro’s number, then convert moles to grams using molar mass.

5. Who uses mole calculations?

Students, chemists, lab technicians, and researchers use mole calculations for chemical reactions and compound analysis.