Mole Calculator

Convert between moles, mass (grams), and number of molecules/atoms.

🧱 Mole Calculator

⚠ Enter valid positive numbers.
Formula
n = m / M
Moles
mol

🧱 Mole Concept

The mole is the SI unit for amount of substance. 1 mole = 6.022 × 10²³ particles (Avogadro's number).

n = m / M   |   N = n × Nₐ
  • n = moles (mol)
  • m = mass (g)
  • M = molar mass (g/mol)
  • N = number of particles
  • Nₐ = 6.022 × 10²³ mol⁻¹

📖 Example

✅ How many moles in 36 g of water (H₂O)?

Molar mass of H₂O = 18.015 g/mol

n = 36 / 18.015 = 1.999 mol ≈ 2 mol

Molecules = 2 × 6.022×10²³ = 1.204×10²⁴

❓ FAQ

What is a mole?
A mole is a counting unit, just like a dozen means 12. One mole means 6.022×10²³ (Avogadro's number) of particles—atoms, molecules, or ions.
How do I find molar mass?
Add up the atomic masses of all atoms in the formula. Use our Molar Mass Calculator to find it instantly.
Comprehensive Guide

The Science Behind Mole

Leverage this Mole Calculator to instantly determine exact values without the hassle of manual formula manipulation. A solid grasp of Mole is critical for safely and effectively handling chemical compounds in practical scenarios. Mastering the concepts behind Mole is crucial for understanding advanced chemical reactions and laboratory procedures.

Why is Mole Important?

In analytical chemistry, precision is everything. Having a reliable way to compute Mole saves time, prevents wasted materials, and ensures scientific accuracy.

Speed
Instant
🎯
Accuracy
100%
🎓
Level
All Levels

Always verify your input units before calculating. Mismatched units (e.g., using mL instead of L) are the most common source of error when determining Mole!

Common Applications

  • Academic Study: Checking literature values against experimental yields.
  • Laboratory Practice: Calculating theoretical thresholds for experiments.
  • Data Validation: Improving general chemistry proficiency.

Relying solely on the calculator without understanding the underlying formula. Always review the step-by-step breakdown to internalize the mechanics.