You can mark a line on the infeed side of your table saw’s carbide blade and use it as a guide to line up perfect crosscuts. With the saw unplugged, hold a straightedge against the left side of the blade, including the outermost edge of the teeth. Press the straightedge ﬁrmly down on the table and mark the line with a ﬁne-point felt-tip pen. Now place the straightedge against the right side of the blade, and draw a line again. You’ll create a line the same width as the kerf the blade will cut.
With a sharp pencil, mark the cutting line on the edge of the board you’re crosscutting, and line it up with the appropriate edge of the line on the table. Push the board through the blade while holding it ﬁrmly against the miter gauge. CAUTION: Never use your table saw’s rip fence when crosscutting. Your off-cut could get trapped between the fence and blade and cause kickback or worse.