This is a free math calculator, which is able to calculate the logarithm for a number to a base. You can also choose the base. Calculate Logarithmic values for Base e, Base 2, Base 10 and Base n. solving logarithm question and Finding values for Log 1, Log 2 (Log of 2), Log 5, Log 6 was never so easy. Exponential equation calculation is done in the app with ease. Calculations available for various log rules: - Product Rule - Quotient Rule - Log of Power - Log of Root - Change of Base - Log of