5 tall cans (500 ml, or 16 oz) of beer is equal to 6.65 regular cans (350 ml, or 12 oz) of beer.
(It doesn't matter if you have ml or oz beers; the difference in the ratio between ml and oz beers is only 0.000005 cans of beer.).
The link to the national lightning saftey institute that you posted earlier is great material, my TI-86 calculator has most this info.except for the beer ratios
John
