Advanced slide type analytical calculator for stack gas analysis has been developed. Calculations on stack gas analysis can be made by this calculator. Calculate items are flue gas quantity which is calculated from the fuel consumption and oxygen content, pollutants emission (SOx, NOx) in flue gas, concentration of pollutants in fule gas, effective stack height, exchange of concentration between ppm and mg/Nm3, correction of concentration of pollutants, moisture content in flue gas, etc.