We all know the ill-effects of a few too many cups of coffee, but when does the amount of caffeine you ingest become toxic? The Death By Caffeine calculator lets you work out how much of your favourite drink would be lethal.
The calculator, which has been customised with a list of Australian soft drinks, asks for your body weight and then spits out the "deadly" number. As the screenshot shows, the in-house spell checker needs a little work, but it suggests that I'm more likely to get health problems from excessive liquid intake than from quaffing the semi-occasional Coke Zero. If you're inspired to cut down your caffeine intake, check out how to use placebos to make the task easier.