Enter any 3 values to calculate the missing variable
Use this calculator to Easily calculate any one of the four key financial values — Principal, Interest Rate, Number of Periods, or Accumulated Amount — by entering the other three. This tool is ideal for planning investments or loans where you need to solve for an unknown using reverse interest formulas. Just input any three values and let the calculator find the fourth.
Reverse Interest Formula
The following formula is used to calculate the principal amount given the interest rate and accumulated amount.
P=A/(1+r) n
Where
A = Accumulated Amount
P = Principal
r = Interest Rate per period (in decimal)
n = Number of periods
What is Reverse Interest?
Reverse interest is the process of determining the initial principal amount of an investment or loan based on the final accumulated amount, the interest rate per period, and the number of periods.
Reverse interest typically refers to the process of finding one unknown financial variable (such as principal, rate, time, or amount) when the others are known, particularly in the context of compound or simple interest formulas.
A Reverse Interest Calculator helps you to solve:
- “How much should I invest now to get $10,000 in 5 years at 5% interest?”
- “What interest rate do I need to grow $2,000 to $3,000 in 3 years?”
- “How long will it take for my money to double at 7%?”