Glycol Dilution Calculator

Calculate the additional amount of glycol required to lower the freeze point of an already filled chilled water loop using this calculator, which takes into account the need to remove some of the existing glycol to accommodate the addition of a higher percentage glycol.  The amount of glycol required will be greater than if you were simply topping off the circuit with glycol without adjusting the percentage.

Formula:  G = V* (%D-%P) / 100- %P

Known System Volume (in Gallons)
Desired Glycol Concentration (in percent…determined by chart in Nu-Calgon literature)
Present Glycol Concentration in Circuit (in percent…determined by refractometer)
Result (in Gallons)