How fast can compounding grow your money?

Explore how starting balance, time and return assumptions interact.

When this calculator is useful

See how a lump sum can grow when interest compounds repeatedly over time.

What to enter

Enter the starting principal, annual interest rate, number of years and compounding frequency.

How to read the result

The ending balance includes your starting principal plus accumulated interest; interest earned isolates the growth generated by compounding.

Questions worth testing

Compare monthly versus annual compounding, a higher or lower rate, and a longer or shorter time horizon.