Given the value of both resistors, and the regulator model, this page calculates the output voltage of the regulator.
Depending on the used model, the output voltage should be at least 2 volts higher than the one wanted at the output. If a lower input voltage is required, a low dropout (LDO) regulator should be used, since they can operate without needing a high voltage drop. For higher efficiency or a voltage booster, a switching regulator is suggested.
Given the value of the resistor and the regulator model, this page calculates the maximum output current, as well as the power disipated by the resistor in the worst case.