Calculators
Calcu-Inversiones
Investment portfolio simulator: split your money across bonds, equities, gold or bitcoin and see where it lands, with compound interest and inflation.
The brief
A tool that shows what actually decides a long-term investment outcome: not picking the right stock, but how you split the money.
The problem
Compound interest calculators hand you a number based on a made-up percentage. They don’t let you see the difference between a conservative and an aggressive portfolio, and they forget that inflation is eating away underneath. Beginners have no idea where to start.
The solution
A simulator where you build the portfolio: eight asset types — bonds, global equities, S&P 500, Nasdaq 100, Russell 2000, gold, bitcoin and whatever you add — with three ready-made splits by risk level.
Enter starting capital, monthly contribution and timeframe, and it returns the growth curve with a range of scenarios, a year-by-year breakdown and the final allocation. Inflation is discounted throughout, so the figures reflect real purchasing power.
The page opens with the cost of doing nothing: what €10,000 from a few years ago buys today. That’s the argument that lands before anyone touches a control.
Calculation runs in the browser, with no sign-up and shareable links to a specific simulation. It carries clear notices that it is educational and not financial advice.
Outcome
Published, with the source code open on GitHub.
