Compound interest calculator

Compound interest is a powerful financial concept that can help you grow your wealth over time. It refers to the interest earned not only on the principal amount but also on the interest earned from previous periods.

In simple terms, compound interest is interest on interest, and it can significantly increase the returns compared to simple interest, which is calculated only on the principal amount.Compound interest is commonly used in savings accounts, investment accounts, and loans, where interest is charged on the outstanding balance.

What is the formula to calculate the compound interest?
The formula for calculating total gain in compound interest is:

A = P * (1 + r/n)^(nt)

The components in this formula are:

  • A = Future value of the investment after a given period of time.
  • P = Principal is the initial amount of money invested or borrowed.
  • r = Rate is the annual interest rate as a percentage.
  • t = Time is the duration of the investment or loan in years.
  • n = Number of times the interest is compounded per year.

Using this formula, one could easily calculate the amount of interest you will earn or pay on a loan or investment.

What are the financial instruments that utilize compound interest?
Compound interest is a more common method of calculating interest than simple interest and is used in various financial instruments, including:
  • Certificates of deposit (CDs): While some CDs may use simple interest, most CDs use compound interest. The interest rate is fixed for a specific term, and interest is earned on the initial deposit as well as any interest earned over time.
  • Bonds: Bonds are debt securities issued by corporations, municipalities, or governments. Most bonds use compound interest, with the interest earned on the principal amount added to the principal, creating a compounding effect.
  • Savings accounts: Many savings accounts use compound interest, which means that the interest earned is added to the account balance and earns interest itself. This compounding effect allows savings to grow more quickly over time.
  • Mutual funds: Mutual funds pool money from multiple investors to invest in a diversified portfolio of stocks, bonds, or other assets. The returns earned by the mutual fund are reinvested, and the compounding effect increases the value of the investment.
  • Retirement accounts: Retirement accounts, such as 401(k)s and IRAs, use compound interest to grow retirement savings over time. The returns earned on the investments are reinvested, compounding the growth of the account.
Compound interest is widely used in the financial world to help investments grow more quickly over time. It is an important factor to consider when evaluating investment options.