EPA 608 leak rate calculator
Calculate an appliance's leak rate with the annualizing or rolling average method from 40 CFR 82.152, and see whether it is over the applicable leak rate in § 82.157.
Fact-checked against official sources (eCFR text as of Nov 3, 2026) · Last checked
Enter the full charge, the refrigerant added and the days since the last addition to see the leak rate.
What the rule says about the calculation
“The leak rate is expressed in terms of the percentage of the appliance's full charge that would be lost over a 12-month period if the current rate of loss were to continue over that period.”
“The same method must be used for all appliances subject to the leak repair requirements located at an operating facility.”
“The owner or operator must calculate the leak rate every time refrigerant is added to an appliance unless the addition is made immediately following a retrofit, installation of a new appliance, or qualifies as a seasonal variance.”
This tool repeats the arithmetic the rule describes. It is a study and planning aid, not a compliance record: the owner or operator remains responsible for the calculation and records the rule requires. Learn the rest of the leak repair rules in the Type II study guide.
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