About StemGadgets
StemGadgets is a collection of lab bench and classroom calculators for students, researchers, and teachers, based in California, USA. Open a tool without creating an account and carry out calculations in your browser.
Using results responsibly
Tools expose formulas, worked examples, or calculation steps where available so you can check the result independently. Check units, assumptions, reagent form, and rounding before using any output. Buffer recipes are reference formulations; follow your institution’s approved protocol and reagent safety documentation.
Review status
We do not claim independent scientific review or institutional validation for this collection. A “reference text updated” date records an edit to that text; it is not a certification of a calculator or recipe. Treat results as aids for learning and routine checks.
Report a correction
Email [email protected] with the page URL, inputs and units, expected result, observed result, and a supporting source if available. Avoid including confidential research data. These details help reproduce and investigate a reported issue.
Local calculations and analytics
Calculator arithmetic runs in your browser. Some pages use Google Analytics for usage measurement; local calculation does not mean the site is free of analytics. See the privacy policy and each tool’s privacy information.
Shared calculation links currently work in ChemBalancer, Molarity Calculator, and SigFigPro. A link includes the selected inputs in its fragment. Anyone with that link can read them, so share only inputs you intend to disclose.
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