disclosed is a measuring device that is adapted for providing conversions from fractions of an inch to decimals of an inch and vice versa . the measuring device includes a ruler having a first edge opposite a second edge . the first edge includes markings for indicating units of measurement in decimals , while the second edge includes markings for indicating units of measurement in fractions . the markings in decimals directly align with corresponding markings in fractions so that the user can determine fraction - decimal equivalents by locating the alignments of the markings . furthermore , the present invention may be a traditional ruler , a retractable tape measure , a measuring tape , a right angle ruler , or a yard stick , depending upon embodiment .