Tools · 8 calculators & checks
Calculate, check, understand for yourself.
You only enter what only you know: amount, period, purchase date. Current price, returns and declines come from real market data. No forecasts, no call to buy.
Real prices: Three times since 2013 the price fell 77% to 85% from its high (daily closes; the monthly closes in the chart show slightly less). Most recently it fell 53% from the 10/2025 high to 06/2026. Source: Bitstamp. The past is no forecast. Calculate it yourself
Move your mouse or finger along the line – or click it and use the arrow keys.
- Open calculationEvery tool explains its assumptions, data and sources.
- Current prices, with fallbackLive via our server with backup sources; otherwise the last known values apply.
- In US dollarsEuro only where the tax office or a provider counts in euro.
- Stays with youCalculated in your browser; your inputs never leave your device.
5 tools
Calculate & compare
What would have happened, what does it cost, when is it tax-free?
- DCA calculatorWhat would a monthly amount have become? Real prices up to today, in US dollars – including every low along the way.In the learning path: Stage 4 · Buyhistorical
- Future scenariosWeak, middle, strong: how comparable periods went so far. Scenarios from real price history, with a crash test – not a forecast.In the learning path: Stage 3 · Planscenarios
- Sats converterConvert between US dollars, BTC and sats at the current price – with a single input.In the learning path: Stage 1 · Understandlive price
- Fee calculatorWhat does buying bitcoin cost at each provider – once or as a savings plan? In dollars, based on the providers’ pricing pages, with date and source.In the learning path: Stage 4 · Buycomparison
- Holding period calculatorFrom which day is each purchase tax-free in Germany? Deadline, FIFO and exemption check – tax amounts in euro, as the tax office calculates.In the learning path: Stage 4 · Buy · Stage 6 · Protect & stay the coursetax DE
3 tools
Check & reflect
How secure are you, what is your goal, what do you already know?
- Security checkHonest questions about your account, wallet and habits – you only see the ones that apply to you. With a traffic light and next steps.In the learning path: Stage 6 · Protect & stay the coursecheck
- Goal compassQuestions on goal, time horizon and risk – ending in a profile and matching deep dives on the learning path.In the learning path: Stage 3 · Planreflection
- Knowledge quizQuestions across all topics – each with a short explanation and a link to read more.In the learning path: Stage 6 · Protect & stay the coursequiz
These tools are for education only. They are not investment, tax or legal advice. Past price performance is no reliable indicator of the future.