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Free Tools

Free Tools & Calculators

Free, no-signup calculators and tools to help you make better money and tech decisions.

Every tool on this page runs entirely in your browser: no sign-up, no data sent to a server, no paywall after three uses. They exist because the underlying rules — German payroll deductions, public-versus-private health insurance break-evens — are genuinely hard to reason about without doing the math properly.

Each calculator links to in-depth guides from our blog that explain the assumptions behind the numbers, what the edge cases are, and what to watch out for before you act on a result. Numbers first, then context.