About HandyReckon

HandyReckon is a collection of precise, no-nonsense calculators built for people who want answers, not accounts. Every tool runs entirely in your browser — nothing is sent to a server, stored, or tracked.

The site covers the calculations people reach for most: loan payments and amortization, compound growth, age and date arithmetic, BMI, unit conversions, word counts, and secure password generation. Each tool includes a plain-language explanation of the underlying formula and a worked example, so you understand the result rather than just reading a number.

HandyReckon is designed to work on any device, load fast on slow connections, and stay usable without JavaScript for the written content. Tools require JavaScript for live calculation, but the explanations and FAQs are always available.

52 tools, zero friction

No sign-up. No email. No popups asking you to subscribe. Pick a tool, enter your numbers, get your answer.