Calibrating the Niche Zero coffee grinder is a simple process. Begin by moving the bean funnel in a clockwise direction until it is tight. Make sure that the calibration mark (situated on the top right of the grinder and marked "Calibrate") lines up with the dot (which you will find on the side of the funnel). If you can't get the two to align, you will have to twist the smaller collar to make smaller movements until the dot is calibrated. When the two match, your Niche Zero is calibrated. Now, move the funnel in a counter-clockwise direction until it reaches the desired grind adjustment setting (which will depend on the type of coffee you'd like to brew).