Download our FREE Calculator/Converter 

With this calculator you can add, subtract, multiply, and divide (MMs, Fractions, and  Decimal inches) without converting to one or the other first.  Just click the button that corresponds with the type of number, enter it, then click the button for the operation that you want to perform, click the next number type button and enter your next number, then click the equal button.  Your answer will be in all the three types of numbers.