Once you have gotten the future value of the loan using the compound interest formula above, you can now deduct the principal loan amount from it to get your compound interest. (myfinancekits.com)
See the simple interest article and calculator to learn more about the simple interest formula. (vertex42.com)
This spreadsheet calculates interest using a compound daily interest formula, which is often used to calculated interest on private student loans. (loanlab.co)