developers.home-assistant/docs/core/entity/number.md

title	sidebar_label
Number entity	Number

A number is an entity that allows the user to input an arbitrary value to an integration. Derive entity platforms from homeassistant.components.number.NumberEntity

Properties

:::tip Properties should always only return information from memory and not do I/O (like network requests). Implement update() or async_update() to fetch data. :::

Name	Type	Default	Description
device_class	string	None	Type of number.
mode	string	auto	Defines how the number should be displayed in the UI. It's recommended to use the default auto. Can be box or slider to force a display mode.
native_max_value	float	100	The maximum accepted value in the number's native_unit_of_measurement (inclusive)
native_min_value	float	0	The minimum accepted value in the number's native_unit_of_measurement (inclusive)
native_step	float	See below	Defines the resolution of the values, i.e. the smallest increment or decrement in the number's
native_value	float	Required	The value of the number in the number's native_unit_of_measurement.
native_unit_of_measurement	string	None	The unit of measurement that the sensor's value is expressed in. If the native_unit_of_measurement is °C or °F, and its device_class is temperature, the sensor's unit_of_measurement will be the preferred temperature unit configured by the user and the sensor's state will be the native_value after an optional unit conversion.

Other properties that are common to all entities such as icon, name etc are also applicable.

The default step value is dynamically chosen based on the range (max - min) values. If the difference between max_value and min_value is greater than 1.0, then the default step is 1.0. If, however, the range is smaller, then the step is iteratively divided by 10 until it becomes lower than the range.

Available device classes

If specifying a device class, your number entity will need to also return the correct unit of measurement.

Constant	Supported units	Description
NumberDeviceClass.APPARENT_POWER	VA	Apparent power
NumberDeviceClass.AQI	None	Air Quality Index
NumberDeviceClass.ATMOSPHERIC_PRESSURE	cbar, bar, hPa, inHg, kPa, mbar, Pa, psi	Atmospheric pressure, statistics will be stored in Pa.
NumberDeviceClass.BATTERY	%	Percentage of battery that is left
NumberDeviceClass.BLOOD_GLUCOSE_CONCENTRATION	mg/dL, mmol/L	Blood glucose concentration```
NumberDeviceClass.CARBON_DIOXIDE	ppm	Concentration of carbon dioxide.
NumberDeviceClass.CARBON_MONOXIDE	ppm	Concentration of carbon monoxide.
NumberDeviceClass.CONDUCTIVITY	S/cm, mS/cm, µS/cm	Conductivity
NumberDeviceClass.CURRENT	A, mA	Current
NumberDeviceClass.DATA_RATE	bit/s, kbit/s, Mbit/s, Gbit/s, B/s, kB/s, MB/s, GB/s, KiB/s, MiB/s, GiB/s	Data rate
NumberDeviceClass.DATA_SIZE	bit, kbit, Mbit, Gbit, B, kB, MB, GB, TB, PB, EB, ZB, YB, KiB, MiB, GiB, TiB, PiB, EiB, ZiB, YiB	Data size
NumberDeviceClass.DISTANCE	km, m, cm, mm, mi, yd, in	Generic distance
NumberDeviceClass.ENERGY	Wh, kWh, MWh, GWh, TWh, MJ, GJ	Energy, this device class should used to represent energy consumption, for example an electricity meter. Represents power over time. Not to be confused with power.
NumberDeviceClass.ENERGY_STORAGE	Wh, kWh, MWh, GWh, TWh, MJ, GJ	Stored energy, this device class should be used to represent stored energy, for example the amount of electric energy currently stored in a battery or the capacity of a battery. Represents power over time. Not to be confused with power.
NumberDeviceClass.FREQUENCY	Hz, kHz, MHz, GHz	Frequency
NumberDeviceClass.GAS	m³, ft³, CCF	Volume of gas. Gas consumption measured as energy in kWh instead of a volume should be classified as energy.
NumberDeviceClass.HUMIDITY	%	Relative humidity
NumberDeviceClass.ILLUMINANCE	lx	Light level
NumberDeviceClass.IRRADIANCE	W/m², BTU/(h⋅ft²)	Irradiance
NumberDeviceClass.MOISTURE	%	Moisture
NumberDeviceClass.MONETARY	ISO 4217	Monetary value with a currency.
NumberDeviceClass.NITROGEN_DIOXIDE	µg/m³	Concentration of nitrogen dioxide
NumberDeviceClass.NITROGEN_MONOXIDE	µg/m³	Concentration of nitrogen monoxide
NumberDeviceClass.NITROUS_OXIDE	µg/m³	Concentration of nitrous oxide
NumberDeviceClass.OZONE	µg/m³	Concentration of ozone
NumberDeviceClass.PH	None	Potential hydrogen (pH) of a aqueous solution
NumberDeviceClass.PM1	µg/m³	Concentration of particulate matter less than 1 micrometer
NumberDeviceClass.PM25	µg/m³	Concentration of particulate matter less than 2.5 micrometers
NumberDeviceClass.PM10	µg/m³	Concentration of particulate matter less than 10 micrometers
NumberDeviceClass.POWER	W, kW, MW, GW, TW	Power.
NumberDeviceClass.POWER_FACTOR	%, None	Power Factor
NumberDeviceClass.PRECIPITATION	cm, in, mm	Precipitation
NumberDeviceClass.PRECIPITATION_INTENSITY	in/d, in/h, mm/d, mm/h	Precipitation intensity
NumberDeviceClass.PRESSURE	cbar, bar, hPa, inHg, kPa, mbar, Pa, psi	Pressure.
NumberDeviceClass.REACTIVE_POWER	var	Reactive power
NumberDeviceClass.SIGNAL_STRENGTH	dB, dBm	Signal strength
NumberDeviceClass.SOUND_PRESSURE	dB, dBA	Sound pressure
NumberDeviceClass.SPEED	ft/s, in/d, in/h, in/s, km/h, kn, m/s, mph, mm/d, mm/s	Generic speed
NumberDeviceClass.SULPHUR_DIOXIDE	µg/m³	Concentration of sulphure dioxide
NumberDeviceClass.TEMPERATURE	°C, °F, K	Temperature.
NumberDeviceClass.VOLATILE_ORGANIC_COMPOUNDS	µg/m³	Concentration of volatile organic compounds
NumberDeviceClass.VOLTAGE	V, mV, µV	Voltage
NumberDeviceClass.VOLUME	L, mL, gal, fl. oz., m³, ft³, CCF	Generic volume, this device class should be used to represent a consumption, for example the amount of fuel consumed by a vehicle.
NumberDeviceClass.VOLUME_FLOW_RATE	m³/h, ft³/min, L/min, gal/min, mL/s	Volume flow rate, this device class should be used for sensors representing a flow of some volume, for example the amount of water consumed momentarily.
NumberDeviceClass.VOLUME_STORAGE	L, mL, gal, fl. oz., m³, ft³, CCF	Generic stored volume, this device class should be used to represent a stored volume, for example the amount of fuel in a fuel tank.
NumberDeviceClass.WATER	L, gal, m³, ft³, CCF	Water consumption
NumberDeviceClass.WEIGHT	kg, g, mg, µg, oz, lb, st	Generic mass; weight is used instead of mass to fit with every day language.
NumberDeviceClass.WIND_SPEED	ft/s, km/h, kn, m/s, mph	Wind speed

Restoring number states

Numbers which restore the state after restart or reload should not extend RestoreEntity because that does not store the native_value, but instead the state which may have been modifed by the number base entity. Numbers which restore the state should extend RestoreNumber and call await self.async_get_last_number_data from async_added_to_hass to get access to the stored native_min_value, native_max_value, native_step, native_unit_of_measurement and native_value.

Methods

Set value

Called when the user or an automation wants to update the value.

class MyNumber(NumberEntity):
    # Implement one of these methods.

    def set_native_value(self, value: float) -> None:
        """Update the current value."""

    async def async_set_native_value(self, value: float) -> None:
        """Update the current value."""