# Humidity Metrics

![](/files/-MihilIDLXjWgi40LBVx)

![](/files/-MihilIEWWpcS4GPkmZk) - [\[source code\]](https://github.com/ladybug-tools/ladybug-grasshopper/blob/master/ladybug_grasshopper/src//LB%20Humidity%20Metrics.py)

Calculate humidity metrics from relative humidity, dry bulb temperature and (if present) atmospheric pressure.

### Inputs

* **dry\_bulb \[Required]**

A value or data collection representing dry bulb temperature \[C]

* **rel\_humid \[Required]**

A value or data collection representing relative humidity \[%]

* **pressure**

A value or data collection representing atmospheric pressure \[Pa] Default is to use air pressure at sea level (101,325 Pa).

### Outputs

* **humid\_ratio**

A data collection or value for humidity ratio (aka. absolute humidity). Units are fractional (kg water / kg air).

* **enthalpy**

A data collection or value for enthalpy (kJ / Kg).

* **wet\_bulb**

A data collection or value for wet bulb temperature (C).

* **dew\_point**

A data collection or value for dew point temperature (C).


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