   SEARCH HOME Math Central Quandaries & Queries  Question from Shian, a student: Hello please help, I just can't seem to get the convertion thing and my mom tried to help but I still don't get it. How many grams does 1 milliliter of water weight? I was told 1g. How many grams does 0.1 liter of water weight? I was told 0.1g. Can you tell me if the answers given are correct with an explaination that I can understand? Thank you. Hi Shian.

1 milliliter (ml) of water weighs 1 gram (g).

The prefix in front of the unit tells you how to move the decimal.

1 milliliter = 0.001 liters because "milli" means "thousandth". 1 "thousandth" of a liter = 0.001 liters.

0.1 liters is 100 times as much as 0.001 liters. Therefore 0.1 liters = 100 ml.

Since each ml of water weights 1 g, 0.1 liters of water = 100 grams.

As well, "kilo" means "thousand". So 1 kilogram (kg) = 1000 grams. This means 100 g = 0.1 kg.

Another way of saying this is that 0.1 liters of water weight 0.1 kg.

So the first answer is correct, but the second one you gave is not. It should be 0.1 kg, not 0.1 g.

I hope this helps you clear up the confusion.
Stephen La Rocque.     Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.