Investment Payment Calculator

Investment Growth Period Calculator

Input Fields

Future Amount (F)

F

$

Enter the future amount you want to achieve

Payment Amount (P)

P

$

Enter the regular payment amount

Annual Interest Rate (i)

i

%

Enter the annual interest rate

Compounding Frequency

MonthlyQuarterlyHalf-YearlyAnnually

CalculateReset

Calculate automaticallyIf enabled, the result will update automatically when you change any value.

Your Results

Number of Payments (N)

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Investment Payment Period 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.