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Zerotoinvest
DEEN

Calculators

Sieben kleine Rechner, die zeigen, was Zahlen mit Geld über die Zeit machen. Alles läuft im Browser, nichts wird gespeichert oder übertragen.

Emergency fund calculator

Work out how big your safety cushion should be, and how long it would cover you without income.

Compound interest calculator

Shows how a starting amount and a monthly contribution grow over time, and how much of the result is your own money versus returns.

Savings-rate comparison

Compares two savings rates over the same period and shows why the rate matters more than chasing returns.

Long-term fee calculator

Shows how much an annual fee eats out of your final result over long time frames.

What your broker really costs you

Enter your own terms and see what they cost over twenty years. No providers are named or recommended.

Pay down debt or invest

Compares the guaranteed saving from paying down debt against the uncertain return of investing, after tax.

Tax on your gains

Works out what's left of a realized gain after tax, under each country's rules.

Position-size calculator

Calculates the maximum position size from your account size, risk per trade, and distance to your stop-loss.

Leverage and liquidation simulator

Shows how far a price can move, at a given leverage, before the position is forcibly closed.

Drawdown calculator

Calculates the gain needed to fully recover from a given loss. The answer surprises most people.

The crash test

Watch your portfolio fall and decide for yourself: hold or sell. Afterward, you find out which historical period it was.

Compare two brokers side by side

Enter the terms of two providers and see the costs side by side. No providers are named, none recommended, no commissions collected.

Which allocation fits you

Derives a percentage allocation from your time horizon and loss tolerance. Deliberately names no product.

The FOMO test

Five short situations show how strongly the fear of missing out is shaping your decisions right now.