FYI in US values for liquids:
This is only true of water, milk, coffee, etc, it doesn't work for honey, molasses, etc. I use a digital kitchen scale that can be set to g or oz to make the conversions easier. I agree that using an on line converter would be helpful, but I go a step further and use a "book of yields" that will tells what a specific ingredient weighs... I was trained to measure everything by weight for school projects, and never got out of the habit.