The Pascal to Torr conversion is a unit conversion that represents the change in pressure from the metric system to the imperial system. It involves converting Pascals (Pa), the standard unit of pressure in the International System of Units (SI), to Torr (Torr), a unit of pressure in the imperial system. One Pascal is equivalent to one Newton per square meter (N/m²), while one Torr is equivalent to one millimeter of mercury (mmHg). This conversion is crucial in various scientific and engineering applications, such as measuring atmospheric pressure, blood pressure, and pressure in industrial processes.