Solves the future-value formula backward: instead of asking what a fixed savings plan grows into after N years, it asks how many years that same plan needs to reach a specific target. Same math as the Compound Growth calculator, just solved for time instead of ending value.

🇵🇹 If the monthly contribution entered here doesn't already include the subsídio de férias or de Natal — and you plan to invest that too — the real date could arrive sooner than this calculation suggests.