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Compound Interest Calculator

Calculate the future value of savings from a starting amount, a monthly deposit, an annual return, and a number of years.

About Compound Interest Calculator

Compound interest is interest earned on both the original amount and the interest already added. This calculator compounds monthly: future value = P × (1 + i)^n + M × ((1 + i)^n − 1) ÷ i, where P is the starting amount, M the monthly deposit made at the end of each month, i the annual rate ÷ 12, and n the number of months. It assumes a constant return and ignores taxes, fees, and inflation. Illustration only, not investment advice.

Also known as: SIP Calculator.

How to use Compound Interest Calculator

  1. Fill in "Starting amount", "Monthly deposit", "Annual return" and "Duration".
  2. The result appears below and updates as you type.
  3. Copy the result with the copy button, or download it as a file where that is offered.

Questions about Compound Interest Calculator

What is the difference between simple and compound interest?

Simple interest is paid only on the original amount, so growth is a straight line. Compound interest is also paid on earlier interest, so the balance grows faster each year the money stays invested.

What is a SIP?

A systematic investment plan is a fixed amount invested at regular intervals, usually monthly. Set the starting amount to 0 and enter your instalment as the monthly deposit to model one.

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