About Finocturne
Finocturne is a free finance learning project built to make financial formulas easier to calculate and understand.
Why Finocturne exists
Many financial tools return a number without explaining where it came from. Finocturne brings calculators, formulas, plain-language explanations, and worked examples together so a first-time learner can follow the reasoning.
Calculator + Learning
Each tool starts with the calculation, then explains the financial meaning, assumptions, and common mistakes. The content stays concise and links to a focused learning guide.
Calculations and data
Core formulas are checked with known examples, edge cases, and unit tests. Calculations run in your browser. Finocturne requires no account and does not store your financial inputs in a database.
A work in progress
Finocturne continues to improve its interface, explanations, and tools. Actual outcomes may depend on markets, fees, taxes, and factors outside each model. The site does not provide personalized investment advice.