Hi how long does it take for alcohol to leave your system as I am a casual drinker and need a urine sample test I am 70kgs in weight

Here is an easy formula for safely determining clearance time for EtOH. Count the number of drinks consumed and multiply by 2. The result gives you the number of hours for elimination based on slowest clearance rate per hour (.01 g/ph) and is safe for M&F.

Can come closer than that with gender, weight & height, number of drinks and time span of consumption but the above is a completely safe formula.