alcohol strenth

[mrtboy64]

can anyone tell me how to test the strength of my geadie lager im having a few mates round soon and they will be asking the strength

[MightyMouth]

For future reference if you get a Hydrometer and take a gravity reading at 20°c it will be something like 1.040 this is called the OG or Original Gravity. Then once the brew is done fermenting take another gravity reading, it should be around 1.008, this is called the FG or Final Gravity. Then using the formula (OG - FG) x 131 = ABV%. This should give you a close approximation of the alcohol by volume. In the case of the above numbers this would be just shy of 4.2%.