Weight conversion help!

hi can any one tell me what 81.5 kg is in stones the scales i use at the gym are only kg and when i googled it i got back 12,11 and my sister got 12,8 its driving me mad lol thanks xx

i use this website: http://www.weightlossresources.co.uk/body_weight/weight_converter.htm

and by this 81.5kg = 12st 11.7lbs

I use the same as Sparkles :D

thats great thanks for your help that means ive lost 11 pounds woop woop xxxxx :D