Compound Interest Calculator
Inputs
$
%
yrs
$
Results
Final balance$125,510.22
Total interest earned$67,510.22
Total contributions$48,000.00
Saved calculations
Stored locally on this device only — never sent anywhere.
Compound interest formula
A = P · (1 + r/n)^(n·t) + PMT · [ ((1 + r/n)^(n·t) − 1) / (r/n) ]- A
- Final balance
- P
- Initial principal
- r
- Annual interest rate (decimal)
- n
- Compounding periods per year
- t
- Time in years
- PMT
- Contribution per compounding period
- Contributions are applied at the end of each period.
- Inflation-adjusted balance divides the final amount by (1 + inflation)^t to show the value in today's dollars.