Bash The Bank

Bash the Bank (BTB) is a free financial calculator which enables the user to enter a Cost, for example, a mortgage advance, a Term (in years or months) and an Interest Rate and have BTB calculate the monthly Payments.
Alternatively the user can enter a Payment and calculate the Rate or the Cost that could be financed.
There is an option to have the rate for a number of days calculated, for example, for a payday loan of £100.00 and a repayment of £120.00 30 days later BTB calculates a rate of 243.33333%