How to convert snowfall and precipitation?

The unit of precipitation (mainly rainfall and snowfall) is: millimeter or liter/square meter. The precipitation of 100 mm is equal to that of 100 L/m2.

If converted into average precipitation depth, the precipitation of 100 mm is equal to 1 m2, and the average depth is 0. 1 m.

The snowfall is the depth of snow converted into the same amount of water, which can be converted into the thickness of snow according to the ratio of 1: 15.