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Investment Payment Calculator

This Investment Payment Calculator estimates the number of periods required to reach a future investment goal based on periodic payments and a fixed interest rate.

Investment Growth Period Calculator

Input Fields
F
$
Enter the future amount you want to achieve
P
$
Enter the regular payment amount
i
%
Enter the annual interest rate
If enabled, the result will update automatically when you change any value.

Investment Payment Period Formula

Formula
$$N = \frac{\log\left( \frac{F \times r}{P} + 1 \right)}{\log(1 + r)}$$

Where:

  • $$N$$ = Number of periods needed to reach the investment goal
  • $$F$$ = Future value (target investment amount)
  • $$r$$ = Interest rate per period (as decimal)
  • $$P$$ = Payment amount per period


The Investment Payment Calculator helps investors estimate how long it will take to achieve a target investment value with regular contributions and a fixed rate of return. It’s ideal for retirement planning, education savings, and long-term financial goal setting.

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Investment Payment Amount

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