There are several decimal equivalent charts on the Internet. The one found at: http://internetwoodworking.com/w5/equivs.html is very clear to read and provides an English, metric, and decimal conversion. Perfect for a woodworking project. Another site: http://www.helpingwithmath.com/printables/tables_charts/cha0501dec_equivalent01.htm provides a simple fraction to decimal conversion. A third
. option, if you looking for a conversion for your tools, this site take the drill size and decimal equivalent into consideration: http://www.thetoolhut.com/drill-decimal-equivalent-chart.html.