Countries where pounds and ounces are commonly used:
United States of America (USA) , South Africa, United Kingdom (UK), Eire (ROI), India, Canada, Australia and the Commonwealth of Nations. coverted in poinds adn stonepounds
A rough guide when you are measuring liquids: 1 ml of water equals 1 gram, 1 litre of water weighs approx 1 kilo - other liquids may differ.
Wikipedia links covering units of mass show/hide