The switch was for accuracy, basically. Your average coffee instructions in the US are very vague: "To make one cup of coffee (where 'cup' means a mug, not a st

The switch was for accuracy, basically. Your average coffee instructions in the US are very vague: "To make one cup of coffee (where 'cup' means a mug, not a standard unit of measurement cup), add one scoop of coffee using our included coffee scoop tool (which holds maybe 1 tbsp of ground coffee, but can vary wildly) per 4 oz water." My method assumes you're buying coffee in ounces and ultimately measuring your coffee consumption in ounces--since no one I know makes themselves 227ml of coffee in the morning. But for all the precise measurements, I used grams and millimeters. It also makes the 15:1 ratio more obvious; that's why I reiterated that 1 gram equals 1 ml.