to convert to 0.00 format you need CONVERT(decimal(3,2),[column 13]) oytherwise you will get a Arithmetic overflow error converting varchar to data type numeric. error. 0,00 is 3 digits long 2 of which are after the decimal place. decimal(2,2) means your answer is 2 digits long of which 2 digits are to the right of the decimal; example .00