Pcifs.com is a free, browser-based chemistry toolkit designed for students, educators, and working chemists. Every calculator runs entirely in your browser — no data leaves your device, no accounts needed, no subscriptions to worry about.
Chemistry is full of calculations that are conceptually straightforward but tedious to perform by hand. Molar masses, dilution problems, gas law equations, pH calculations — these come up constantly in coursework and lab work. We built Pcifs.com to handle these calculations quickly and accurately so you can focus on understanding the chemistry, not the arithmetic.
Every tool on this site uses JavaScript to perform calculations directly in your web browser. We never send your input to a server. This means your data stays completely private, and the tools work even without an internet connection once the page is loaded.
All calculators use standard formulas and accepted values (IUPAC atomic weights, standard enthalpies, etc.). However, these tools are intended for educational and reference purposes. For research, medical, or industrial applications, always verify results using authoritative sources or validated software.
We currently offer 30 chemistry calculators across these categories:
Visit our contact page to suggest new tools or report issues.