Compound Interest Calculator

See how your money grows when interest earns interest.

Balance at the end
270,704.15
170,704.15 of it is interest
Total you put in
100,000.00
Interest earned
170,704.15
Growth
171%
YearDepositsInterestBalance
1100,000.0010,471.31110,471.31
2100,000.0022,039.10122,039.10
3100,000.0034,818.18134,818.18
4100,000.0048,935.41148,935.41
5100,000.0064,530.89164,530.89
6100,000.0081,759.43181,759.43
7100,000.00100,792.02200,792.02
8100,000.00121,817.56221,817.56
9100,000.00145,044.76245,044.76
10100,000.00170,704.15270,704.15

Your savings

Added at the end of each month.

The result assumes a fixed rate and no fees, tax or inflation. Real returns vary. This is not financial advice.

Calculated in your browser. Your numbers are not sent or saved.
Guide

How to calculate compound interest

1

Enter your savings

The starting amount, and how much you add each month.

2

Set the rate and time

The yearly interest rate, the number of years and how often interest is added.

3

Read the growth

See the final balance, the interest earned and a table for every year.

Frequently asked questions

What is compound interest?

Interest that is added to your balance, so that the next interest is earned on the interest as well. It makes savings grow faster than simple interest.

How is it worked out?

Each month the balance grows by the monthly share of the interest rate, then your deposit is added at the end of the month.

Does compounding more often help?

A little. Monthly compounding gives slightly more than yearly at the same rate, and daily slightly more again.

Does it include tax, fees or inflation?

No. It assumes a fixed rate. This calculator gives estimates only and is not financial advice.

Related tools

See all calculators →