The System Capacitance Calculation determines the capacitance of a system based on the airflow, pressure drop, and time it takes for the pressure to drop when no compressors are loaded. The system capacitance indicates how well a system can hold pressure without any replenishment, considering the receiver tank and distribution pipeline. To calculate the capacitance, input the system flow in cubic meters per minute (m³/min), the drop in pressure in bar, and the time it takes for the pressure to drop in seconds (s). The result will be the system capacitance in cubic meters (m³).