# What is the unit used for Water Vapor?

##### 1 Answer

Jan 5, 2018

Grams per kilogram

#### Explanation:

When measuring water vapor, the relatively humidity is only a ratio of the amount of water vapor to the maximum amount of water vapor so there isn't really a unit. The absolute humidity can be determined by finding the relative humidity and then looking at the temperature. When you determine this you fin out how many grams of water vapor are in the air per kilogram of air.