About Reckonary

Reckonary is a small, growing collection of calculators for money and everyday life. The idea is simple: a calculator should give you the right answer and show you how it got there — not bury a number under pop-ups, logins, and noise.

What makes a Reckonary tool different

• It shows its work. Every calculator explains the formula in plain language, so you can trust the result instead of guessing.
• It is checked by hand. The math behind each tool is written as plain, tested code with known inputs and outputs, so the numbers hold up.
• It stays out of your way. No sign-up, no clutter, and never an advert inside the calculation itself.

How we keep it accurate

Each calculator is built from a documented formula with worked examples, then verified against figures you can check yourself. When something can be sourced, we cite it. If you ever spot a result that looks off, tell us on the contact page — corrections are a priority.

A note on advice

Reckonary is built for education and quick estimates. It is not financial, legal, tax, or medical advice. For decisions that matter, check the numbers with a qualified professional.