diff --git a/docs/core/entity/number.md b/docs/core/entity/number.md
index 3fbc6f27..31aab935 100644
--- a/docs/core/entity/number.md
+++ b/docs/core/entity/number.md
@@ -54,7 +54,7 @@ If specifying a device class, your number entity will need to also return the co
 | pm10 | µg/m³ | Concentration of particulate matter less than 10 micrometers |
 | power | W, kW | Power.
 | power_factor | % | Power Factor
-| precipitation | in, mm | Precipitation
+| precipitation | cm, in, mm | Precipitation
 | precipitation_intensity | in/d, in/h, mm/d, mm/h | Precipitation intensity
 | pressure | cbar, bar, hPa, inHg, kPa, mbar, Pa, psi | Pressure.
 | reactive_power | var | Reactive power |
diff --git a/docs/core/entity/sensor.md b/docs/core/entity/sensor.md
index 68612ae5..d79b213f 100644
--- a/docs/core/entity/sensor.md
+++ b/docs/core/entity/sensor.md
@@ -57,7 +57,7 @@ If specifying a device class, your sensor entity will need to also return the co
 | pm10 | µg/m³ | Concentration of particulate matter less than 10 micrometers |
 | power | W, kW | Power, statistics will be stored in W.
 | power_factor | % | Power Factor
-| precipitation | in, mm | Precipitation
+| precipitation | cm, in, mm | Precipitation
 | precipitation_intensity | in/d, in/h, mm/d, mm/h | Precipitation intensity
 | pressure | cbar, bar, hPa, inHg, kPa, mbar, Pa, psi | Pressure, statistics will be stored in Pa.
 | reactive_power | var | Reactive power |