All online calculators

Liczbnik is a collection of free online calculators tailored to Polish rules — tax rates, ZUS contributions, regulations and exchange rates. Every tool runs in the browser, with no registration or installation, and results appear instantly as you type. We have grouped the tools into 30 thematic categories so you can quickly find the right calculator — from salaries and taxes, through loans and real estate, to health, mathematics and converters.

Each calculator includes a formula explanation, a step-by-step example and a set of frequently asked questions, and the rate data comes from a versioned registry updated whenever the rules change. Results are indicative and do not constitute tax, legal or medical advice — consult a specialist if in doubt. Start with the category that interests you, or use the shortcut list at the top of the page.