Compound Interest Calculator
Calculate growth from a starting balance and fixed compound interest.
Processing stays in your browser. Assumes a constant rate without deposits, withdrawals, tax, or fees. This is a mathematical estimate, not a guaranteed return.
How to use the compound interest calculator
Calculate growth from a starting balance and fixed compound interest. Complete the starting principal, annual rate (%), years, compounds per year fields above. Choose Run tool, review the output, then copy or download the result.
Example
1,000 at 10% compounded annually for two years becomes 1,210.
Good to know
Assumes a constant rate without deposits, withdrawals, tax, or fees. This is a mathematical estimate, not a guaranteed return.