Note that caffeine amounts are for the whole can/bottle."It's hard to find out if cafeine content of various drinks is the same in the US as it is elsewhere, because the US content is listed in fluid ounces, and the rest of the world is in ml. (1 US liquid ounce = 29.5735296875 ml)
WikiAnswers tells us that a 32 oz can of Coca-Cola Clasic contains 34 mg, "For comparison, green tea has about 25 mg per 12 oz, black about 50, and coffee can have upwards of 200 mg." From the Australian Food Standards site we learnt that milk chocolate has 20 mg/100g bar, but the Lindt website says
"Caffeine is a natural compound derived from plant sources like kola nut and naturally found in substances like coffee and tea. However, very little caffeine is found in chocolate in comparison to the amount found in the other commonly consumed sources. Generally, 1oz of Dark Chocolate contains about 20 mg of caffeine 1 oz of Milk Chocolate contains about 6 mg of caffeine 1 oz of White Chocolate contains less than 2 mg of caffeine By comparison, an average can of soda contains about 50 mg of caffeine and the average cup of coffee approximately 80 ? 155 mg. The caffeine content will always vary, depending on the product and even in some cases depending on the specific cocoa bean and origin. "
So put on your math hats, and figure this out!
1 oz = 28.3495 gr
100 gr = 3.52739619496 oz
Fluid ounces are different from dry ounces...
Here are the various content descriptions:
32 mg in a 330ml can of Coca‑Cola
17 mg (milligrams) of caffeine were in a filter drip cup of coffee
100 mg in a mug of coffee
25 mg per 12 oz green tea
50 mg per 12 oz black tea
200 mg per 12 oz coffee
20 mg of caffeine in 1oz of Dark Chocolate
6 mg of caffeine in 1 oz of Milk Chocolate20 mg per 100g bar of milk chocolate
Are they all saying the same thing?