Average Interest Rate Calculator
Enter description of the debt in the fist column (optional, for your own reference), then the current principal balance of that debt in the seconded column followed be the annual interest rate in the third column. Don't enter a value in the forth column, this will be calculated automatically once you hit Calculate Results.
With this calculator you can calculate the average interest rate you are paying on up to 15 lines of credit which will help you to determine what the rate on a potential new loan should be to pay off the existing lines.
This calculator is particularly useful if you are planning on obtaining a seconded loan in order to pay off existing revolving credit lines.