Compound Interest Calculator
Calculate interest that compounds over time.
Compound Interest
Calculate interest that compounds over time.
%
Final amount
1103.812891
- Interest earned: 103.812891
How it works
Enter the principal, the annual interest rate, the number of years, and how many times per year interest compounds.
Each compounding period earns interest on the principal plus all interest already earned, not just the original principal.
Compounding frequency must be a positive whole number (e.g. 1, 4, 12, 365).
Formula
A = P(1 + r/n)^(nt)
principal (P), annual rate (r), years (t), compounds per year (n)
Worked example: 1000 at 10% compounded quarterly for 1 year earns 103.812891 interest, for a final amount of 1103.812891