Chemistry Calculators

Coming soon

Molar mass, concentration, dilution and gas laws. Every chemistry calculator on CalClu is free, works instantly as you type and needs no sign-up, so you can get a reliable answer in seconds on your phone or computer.

We're building the first chemistry calculators now. Until they arrive, describe your question in plain words in the problem helper on the home page and it will point you to the closest calculator we already have.

To use a calculator, pick a tool, enter your numbers and read the result straight away. Change any value to compare scenarios, and copy the page link to bookmark or share a calculation. Results are estimates for general information; for important financial, medical, legal or engineering decisions, confirm the numbers with a qualified professional.

Can't find what you need? Use the search at the top of the page (Ctrl K) or browse every calculator from A to Z. New chemistry tools are added regularly, and suggestions from visitors help decide what we build next.

All chemistry calculators

Calculators for this category are on the way. Describe your problem on the home page or browse all calculators.

Chemistry guides

How to Dilute a Solution Using C1V1 = C2V2Learn the dilution formula C1V1 = C2V2, how to work out how much stock solution and water you need, and how to make serial dilutions accurately.2 min read

Frequently asked questions

Are the chemistry calculators free?

Yes. Every calculator on CalClu is free, and you never need an account to calculate.

How accurate are the results?

Each calculator uses standard, published formulas and shows how the answer is worked out. Results are estimates for general information, so double-check anything important with a qualified professional.

Can I suggest a new chemistry calculator?

Yes, please do. Send your idea through the Contact page and tell us what you'd like to calculate.