This dado measuring gauge from Infinity Tools tells you exactly which blades and chippers to use for a given dado thickness. Simply find the slot that matches the stock and read the combination next to it.
Designed to work with their Dadonator stacked dado blade set, the dado measuring gauge should work with any stacked dado set that uses 1/4″ blades and 1/16″, 3/32″, and 1/8″ chippers — practically all of them. It’ll measure 19 different thicknesses, accurate to within .003″.
Available directly from Infinity Tools, you’ll pay $30 plus $8 S&H for this gauge.
Dado Measuring Gauge [Infinity Tools]