From time to time someone says to me something like "well, tea has as much caffeine as coffee, you know!" My memory is not great but I usually remember that I went and looked it up before and that this wasn't quite true but I can't quite remember the numbers. So, here it is, Dave's memory-in-a-webpage!
Please note: I rooted around all over the place and collected numbers from several sites so the numbers are the best I can get without actually measuring myself. But the value for "the amount of caffeine in X" can vary by a factor of 8 depending on a lot of factors. So PLEASE don't tell me these are wrong unelss you have taken this variability into account.
| Kind | Size ml | Size oz | Caffeine (mg) | mg/ml |
| Esspresso | 30 | 1.0144206 | 40 | 1.33 |
| Drip (Hi) | 316.6664 | 8 | 192 | 0.61 |
| Tea (Hi) | 148 | 5 | 80 | 0.54 |
| Drip (Lo) | 316.6664 | 8 | 100 | 0.32 |
| Tea (Lo) | 148 | 5 | 40 | 0.27 |
| Red Bull | 355 | 12.0039771 | 80 | 0.23 |
| Jolt | 355 | 12 | 71.2 | 0.2 |
| Ice Tea | 355 | 12 | 70 | 0.2 |
| M Dew | 355 | 12 | 55 | 0.15 |
| D Coke | 355 | 12 | 45 | 0.13 |
| Pepsi | 355 | 12 | 38 | 0.11 |
| Coke | 355 | 12 | 34 | 0.1 |
| Hot Cocoa (Hi) | 148 | 5 | 8 | 0.05 |
| Choc Milk (Hi) | 148 | 5 | 7 | 0.05 |
| Decaf (Hi) | 148 | 5 | 5 | 0.03 |
| Decaf (Low) | 148 | 5 | 2 | 0.01 |
| Choc Milk (Lo) | 148 | 5 | 2 | 0.01 |
| Hot Cocoa (Lo) | 148 | 5 | 1 | 0.01 |