Le guide ci-dessous n'est pas encore disponible en français et s'affiche en anglais. Le calculateur lui-même est entièrement traduit.
Comment utiliser ce calculateur
- Enter the present value, the amount you have today.
- Enter the interest rate per period and the number of periods. For monthly periods, divide an annual rate by 12.
- Optionally enter a payment added each period, and whether it is made at the start (annuity due) or end (ordinary annuity) of each period.
Formule
The future value combines the growth of the lump sum and the future value of an annuity. For payments at the start of each period, the annuity part is multiplied by (1 + i).
FV = PV × (1 + i)^n + PMT × ((1 + i)^n − 1) / i
FV (annuity due) = PV × (1 + i)^n + PMT × ((1 + i)^n − 1) / i × (1 + i)
Example
- PV = $10,000, i = 6% per period, n = 10, no payments.
- FV = 10,000 × 1.06^10 = 10,000 × 1.790848 ≈ $17,908.48.
Questions fréquentes
What is the time value of money?
Money available now is worth more than the same amount later, because it can earn interest. Future value measures what today's money grows to.
How do I handle monthly compounding?
Use the monthly rate (annual rate ÷ 12) and the number of months as periods, for example 0.5% for 120 periods instead of 6% for 10.
Can the rate be negative?
Yes. Negative rates are allowed for scenarios such as real (inflation-adjusted) returns below zero.