A free calculation aid
Grams to Moles is a free browser tool maintained by an individual developer. These terms govern use of the website and calculator. If you do not agree with them, please do not use the site.
Check the chemistry behind the number
You are responsible for choosing the correct formula, quantity, units, and molar mass for your purpose. The formula calculator uses the published atomic-weight values described on the homepage. Natural isotope variation, sample purity, hydrate composition, measurement uncertainty, and unsupported notation can all affect whether a result fits your situation.
Displayed significant figures are a formatting choice, not a guarantee of experimental precision. Independently verify results before relying on them for laboratory work, purchasing, assessment, or another consequential decision. This website supplies arithmetic and general explanations; it does not provide laboratory procedures, chemical handling instructions, or professional safety advice.
Use the site responsibly
You may use the calculator and save, copy, or print your results for lawful purposes. Do not attempt to damage the service, bypass security protections, interfere with other visitors, or use the website to distribute harmful material. Reference materials linked from the site remain subject to their owners' terms.
Accuracy and availability
I aim to make the tool accurate and easy to use, but errors and interruptions are possible. The website and its results are supplied “as is” and “as available,” without a guarantee that they will be complete, error-free, or suitable for every task. I may correct, change, or discontinue features.
To the extent permitted by applicable law, I am not responsible for losses arising from use of, or inability to use, the site or reliance on a result. Nothing here excludes liability that cannot lawfully be excluded or limits rights you have under applicable law.
Corrections, questions, and updates
Report a problem or ask about these terms at contact@gramstomoles.org. The privacy policy describes information handling. Updated terms will be posted here with a revised date and apply to use after that update.