Units

Data Units

All data recorded by WeatherCitizen has SI units. Some units are in the SI base units while others are recorded in the standard meterological unit for that property.

The default units for sensor values are:

Sensor	Platform	SI Unit	US Unit (display only)
Accelerometer	Android, iOS	m/s2	ft/s2
Altitude	Android	m	ft
Air Density	Kestrel 5500, Kestrel Drop	kg/m3	lbs/ft3
Ambient Temperature	Android	degC	degF
Barometric Pressure	Kestrel 5500, Kestrel Drop	mbar	mbar
Carbon Monoxide	FireMonitor	ppm	ppm
Dew Point	Kestrel 5500, Kestrel Drop	degC	degF
Gravity	Android	m/s2	ft/s2
Gyroscope	Android	rad/s	rad/s
Heat Stress Index	Kestrel Drop Fire	degC	degF
Light	Android	lux	lux
Linear Acceleration	Android	m/s2	ft/s2
Magnetic Field	Android	uT	uT
Orientation	Android	deg	deg
Orientation	Android	deg	deg
Particulate Matter	Airbeam2, FireMonitor	ug/3	ug/3
Pressure	Android, iOS	mbar	mbar
Proximity	Android	cm	in
Relative Humidity	Android	%	%
Rotation Vector	Android	none	none
Step Counter	Android	steps	steps
Wind Speed	Kestrel 5500	km/h	mph

Display Units

The WeatherCitizen app can be customized to display units in SI or US units. By default the app displays units in SI.

Unit conversions in the app are performed using the mathjs library. When defining units in a custom input field, the string used to define the units must correspond to the mathjs unit reference strings.