There's a problem with the Blood Alcohol Calculator when I give my weight in stone.
If I enter my weight, 12 Stone (=168lbs), and that I had 3 standard drinks (1 1/2 pints of beer), one hour since first drink, the system give me a sky high BAC and tells me I'm likely to be in a coma!
This just seems to occur when entering weight in Stone. If I enter it in lbs or kgs the system comes out with a more sensible calculation.
People in the UK and Ireland often use the stone measurement for their weight, so you should try and fix this.