How many from 0.25m to how many mm?

Answer 1

There are one thousand millimetres in a metre the prefix milli- stands for thousandths. So 0.25 metres is 0.25 x 1000 millimetres, which is 250 mm.

Answer 2

From 0.25 meters to millimeters:

0.25 meters = 250 millimeters. To convert meters to millimeters, you multiply by 1000 because there are 1000 millimeters in a meter.

So, 0.25 meters * 1000 = 250 millimeters.