A five day training course on the principles and practices of pressure calibration using digital pressure calibrators and piston gauges (pressure balances). The class is designed to focus on the practical considerations of pressure calibrations. The topics begin with the fundamental physics of pressure, moves through metrological terminology, discussion on calibration principles, piston gauge fundamentals, and a discussion on the day-to-day issues that can influence the quality of a calibration. A focal point of the class is hands-on calibration exercises.