Molar Mass Calculator
Grams per mole and mole conversions.
Enter your values
Enter the mass in g.
Enter the molar mass in g/mol.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Moles
- 0.4278
- Particles
- 2.5762e+23
- Mass per mole
- 58.44 g/mol
- Mass for 1 mole
- 58.44 g
Quick answer
Molar mass converts between the mass of a substance and the number of moles.
moles = mass ÷ molar mass
At a glance
| What it does | Grams per mole and mole conversions. |
|---|---|
| Category | Science |
| Inputs needed | Mass, Molar mass |
| Main output | Moles |
| Formula | moles = mass ÷ molar mass |
| Cost | Free — no sign-up, no download |
How to use the Molar Mass Calculator
- 1Enter the mass of your sample.
- 2Enter the compound's molar mass.
- 3Read moles and particle count.
Inputs explained
- Mass(g)
- Enter the mass in g.
- Molar mass(g/mol)
- Enter the molar mass in g/mol.
Worked example
Using the values the calculator loads with:
Inputs
- Mass25 g
- Molar mass58.44 g/mol
Results
- Moles0.4278
- Particles2.5762e+23
- Mass per mole58.44 g/mol
- Mass for 1 mole58.44 g
Frequently asked questions
What is the molar mass of NaCl?
58.44 g/mol.
What is Avogadro's number?
6.022 × 10²³ particles per mole.
What do I need to enter into the Molar Mass Calculator?
Just 2 values: mass, molar mass. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Molar Mass Calculator work out the answer?
Molar mass converts between the mass of a substance and the number of moles. It applies the formula moles = mass ÷ molar mass and shows the working so you can check each step by hand.
Is the Molar Mass Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.