About Smarter Than You Look

These pages are the simple money maths nobody taught you. Percentage change, interest, CAGR, Kelly, pip value: the boring building blocks that show up in every bank statement, broker app and investment pitch, usually without the formula written down.

Built in London by a finance professional, out of the maths he has found genuinely useful in his own life: mortgages, savings, investing and the odd trade. The voice is wry on purpose. Finance already has enough serious faces. If a tool saved you a headache, you can buy me a glass of wine 🍷. Entirely optional, always appreciated.

Every tool is free, runs in your browser, and does not pull live market data. You type the numbers. We show the maths. Server-rendered formula, worked example and FAQ on every page so search engines and AI assistants can cite them properly.

More calculators land roughly once a week.