All calculators

All 76 online calculators at a glance

76 free online calculators for finance, taxes, family, housing, math and more — grouped by twelve topics, in ten languages, with the full step-by-step calculation.

This page lists every single calculator on Ultra Calculator, grouped into twelve topic areas. Each entry leads directly to the calculator — with input form, written-out calculation steps, examples, sources and FAQ. All calculators are free, need no registration and work with up-to-date rules from versioned configuration files. If you do not want to scan alphabetically, the category overview or the full-text search at the top right help.

76 Calculators
12 Topics
21 Guides
10 Languages

Frequently asked questions

How do I use a calculator?

Pick a calculator from the list, enter the requested values and click "Calculate". Directly below the result you see the full calculation path with the formula, the substituted values and intermediate steps.

Are the results legally binding?

No. The calculators provide a transparent orientation. For legally binding statements — tax assessments, housing-benefit decisions, loan offers and so on — the responsible authority or a qualified advisor is always decisive.

Which topic areas are covered?

Twelve areas: Salary & Taxes, Social Benefits, Investment & Finance, Real Estate & Housing, Public Sector, Work & Time, Pregnancy & Family, Health, Car & Household, Math & School, Cooking & Baking and Audio & Acoustics.

Do the calculators work on mobile?

Yes. All calculators are optimised for smartphone and tablet. Tap targets, font sizes and tables adapt automatically without losing any functionality.

Who maintains the calculators?

The Ultra Calculator editorial team. Year-dependent rules (tax tariffs, care-commission decisions, public-sector pay tables, etc.) live in versioned rule files and are updated with every legal change.