About Smekys

Smekys is a free library of online calculators built to make everyday number-crunching fast, clear and accessible to everyone. We currently publish more than a thousand calculators across personal finance, health and fitness, mathematics, home improvement, automotive, education, travel and general life.

Every calculator runs directly in your browser. As you type, results update instantly — there is nothing to install, no account to create and no software to download. We reference established formulas and public guidance (such as CDC, IRS and standard actuarial formulas) and show the math behind each result so you can verify it yourself.

Privacy is a core principle. Your inputs never leave your device — calculations happen locally on your computer or phone. We do not ask for personal information and we do not store your entries. To keep the site free, we display non-intrusive advertising from trusted partners such as Google AdSense.

Our goal is simple: give you a trustworthy, ad-supported tool that answers your question in seconds. If a calculator is missing or could be improved, we would love to hear from you.