Your Reaction to Drink
Even if you are under the limit, you can still be charged with impairment through drink or drugs
Alcohol is quickly absorbed into the bloodstream. This affects the brain and impairs driving ability.
It is almost impossible to judge your blood alcohol level from the number of drinks you have consumed. It depends on various factors:
- Your weight
- Your gender
- Your age
- Your metabolism
- If you have had food
- Your overall state of health
Our slide ruler shows the major changes that occur to the human body as a result of alcohol consumption. Most people's driving skills will be impaired long before they show signs of outward drunkenness.
The only way not to get caught drink-driving is not to drink at all.
Use our scale to see how your body reacts to alcohol.
Under the legal limit but still impaired
At blood alcohol level 20-49mg/100ml
- Inability to see or locate moving lights correctly
- Problems in judging distances
- Tendency to take risks
Under the legal limit but still impaired
At blood alcohol level 50-79mg/100ml
- Impaired judgement of distances
- Impaired adaptability of eyes to changing light conditions
- Impaired sensitivity to red lights
- Severe impairment of ability to react and of concentration
Over the legal limit
At blood alcohol level 80-119mg/100ml
- Euphoria setting in – overestimation of one's own abilities
- Impairment of peripheral vision
- Increased impairment of eyes' reaction to light and dark
- Impaired perception of obstacles
Over the legal limit
At blood alcohol level 120-140mg/100ml
- Serious impairment of concentration and vision
- Very delayed and impaired reactions
- Major orientation problems
