Hi I’msomebuddy
As helping hand said, it really is different for every person, there is no exact numbers and figures.
Just like one person can pass a police breathalyser after drinking 2 pints but another may fail. There is so many contributing factors.
Can I ask if you don’t mind, why the significance of needing the numbers?
Is it for validation of you are testing him or are you worried about a test at work or similar?
I hope you and.youre son are well
James x