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All calculators sorted by topic

76 specialised online calculators across twelve topic areas — free, with worked examples, no sign-up, in ten languages.

Whether tax returns, housing-benefit applications, mortgage rates, recipe quantities or pregnancy weeks — Ultra Calculator bundles 76 specialised online calculators across twelve topic areas. Each calculator shows the full step-by-step calculation, provides concrete examples and cites the underlying sources or laws. All calculators are free, require no registration and are available in ten languages — important also for the international workers living and working in Germany. Choose your topic below and go straight to the matching calculators and guides.

76 Calculators
12 Topics
21 Guides
10 Languages

Frequently asked questions

How many calculators are there on Ultra Calculator?

Currently 76 specialised online calculators across twelve topic areas — from finance and taxes to social benefits, pregnancy and family, kitchen, mathematics and audio. The catalogue keeps growing.

Are the calculators free?

Yes. All calculators are free to use without registration, fees or hidden limits. The site is supported by carefully placed advertisements.

In which languages are the calculators available?

In ten languages: German, Polish, English, French, Spanish, Portuguese, Romanian, Ukrainian, Hungarian and Arabic. Switch the language using the menu at the top right.

Where can I find the step-by-step calculation?

Each calculator shows the full step-by-step calculation directly below the result — formula, substituted values and intermediate steps. Every result is traceable and verifiable.

Are the calculators kept up to date?

Yes. Year-dependent rules such as tax tariffs, social-benefit rates and collective wage tables live in versioned rule files and are updated with every legal change.