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SnapCalculations

Compound Interest Calculator

Find out how much your money could grow. Combine a starting amount with regular monthly contributions and compare daily, monthly, quarterly or yearly compounding.

$
$
%
years

Future value

$54,713.58

after 10 years

Total contributed
$34,000.00
Interest earned
$20,713.58
Contributions 62% Interest 38%

Year-by-year growth

YearContributedInterestBalance
1$12,400.00$801.42$13,201.42
2$14,800.00$1,834.27$16,634.27
3$17,200.00$3,115.28$20,315.28
4$19,600.00$4,662.39$24,262.39
5$22,000.00$6,494.83$28,494.83
6$24,400.00$8,633.24$33,033.24
7$26,800.00$11,099.74$37,899.74
8$29,200.00$13,918.03$43,118.03
9$31,600.00$17,113.55$48,713.55
10$34,000.00$20,713.58$54,713.58

How it works

  • Without contributions: A = P × (1 + r ÷ n)^(n × t), where n is compounds per year and t is years.
  • With monthly contributions, the calculator simulates every month: the balance grows by the equivalent monthly rate, then your contribution is added.
  • Interest earned = final balance − everything you contributed.

Frequently asked questions

What is compound interest?

It is interest earned on both your original money and on interest already earned, so growth accelerates over time.

Does compounding frequency matter much?

More frequent compounding gives slightly more growth, but the rate and time invested matter far more.

Are returns guaranteed?

Only for fixed-rate products like deposits. Investment returns vary, so treat the result as an estimate, not a promise.

Results are estimates for general information and are not financial, medical or professional advice.