EtGCalc.org
EtGCalc.org is a free educational online tool that helps people understand EtG alcohol detection windows, common cutoff levels such as 100 ng/mL and 500 ng/mL, and why detection times can vary.
The calculator is free, requires no signup, and is designed for informational use only. It does not provide medical, legal, or treatment advice, and encourages users to speak with qualified professionals for health, probation, legal, or recovery decisions.
