Free calculators, clean equations, and the context that actually makes them make sense. Built by a ChemE student who just went through it — not someone who taught it thirty years ago.
Most ChemE resources are either too vague or buried in a $300 textbook. This is neither.
No sign-up, no loading screens. Type your values, get your answer. Every calculator works in under a second.
Every calculator shows the equation it's solving with proper LaTeX rendering — not just a black box that spits out numbers.
Built by someone who just survived these courses. The "About this equation" sections explain what professors skip over.
New calculators, study guides, and worked examples get added based on what students actually need. Have a request? Let us know.
From freshman mass balances to senior transport phenomena — it's all here.
Every key equation from all 6 topics in one clean PDF. Made for exams, problem sets, and the moments when you have no idea what the flux is going on.