Open the Mole Calculator
MoleMath helps you solve the mole problems that appear in every chemistry course: converting between grams, moles and particles, finding molar mass, and working through stoichiometry. Enter
- Free to use
- No signup
- Nothing to install
- Works in any modern browser
Illustration. Open the tool for the real thing.
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Sample input: Enter value… = 1000
What is the Mole Calculator?
MoleMath helps you solve the mole problems that appear in every chemistry course: converting between grams, moles and particles, finding molar mass, and working through stoichiometry. Enter your values and see each step, so you learn the method instead of just getting an answer.
The mole is the chemist's counting unit: one mole contains 6.022 x 10^23 particles (Avogadro's number). Every calculation here builds on that idea plus the molar mass from the periodic table.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
Convert using molar mass with the steps shown.
Move between moles and atoms or molecules.
Use balanced equations and mole ratios to find reactants and products.
Check your homework answers and understand each step.
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
How it compares
A plain look at this tool next to the usual alternative.
| This study tool | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
Questions people ask
How do I convert grams to moles?
Divide the mass in grams by the molar mass in grams per mole.
What is Avogadro's number?
It is 6.022 x 10^23, the number of particles in one mole.
What is molar mass?
The mass of one mole of a substance, found by adding the atomic masses in its formula.
Is the mole calculator free?
Yes, it is free with no signup.
How do I use the Mole Calculator?
1. Pick the calculation you need. 2. Enter the substance or molar mass and the known quantity. 3. Run the calculation. 4. Review the worked steps.
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MoleMath helps you solve the mole problems that appear in every chemistry course. Free to use.
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