Compound Interest Computer

This compound interest calculator shows how your investment grows over time.
With our compound interest calculator, you can visualize the powerful effect of compound interest and see how your investments and savings grow steadily over time.
Calculation Period
Starting amount
Principal
Annual investment
Extra investment every year
Year
Number of years
t_compoundInterest_rate_year(%):
Annual return rate

Final Result

Principal

0

Compound interest

0

Total Amount

0

Total Return Rate

0

Use example

Compound Interest Computer Use example

What is compound interest?

Compound interest is a financial calculation method that not only calculates the interest generated by your principal but also adds these interests to the principal to calculate new interest, creating a snowball effect.


Compound Interest Formula Analysis

FV = PV(1 + i)n

FV (Future Value): The expected value of your investment at a future point in time.

PV (Present Value): Your current investment amount or principal.

i: Annual interest rate or expected annual return rate.

n: Investment period, usually in years.


The Power of Compound Interest

Example: Principal 100, annual interest rate 20%.

First YearSecond YearThird Year
Compound interest100 * (1+20%) = 120120 * (1+20%) = 144144 * (1+20%) = 173
Simple interest100 + (100*20%) = 120120 + (100*20%) = 140140 + (100*20%) = 160

From this example, we can see that the effect of compound interest strengthens over time. The investment return in the second year is 4 more than the first year, and the third year is 13 more than the second year. This is the power of compound interest - your investment returns get better and better over time.