diff --git a/esphome/components/sen5x/sensor.py b/esphome/components/sen5x/sensor.py
index a8a796853e..f52de5fe85 100644
--- a/esphome/components/sen5x/sensor.py
+++ b/esphome/components/sen5x/sensor.py
@@ -4,6 +4,7 @@ import esphome.codegen as cg
 from esphome.components import i2c, sensirion_common, sensor
 import esphome.config_validation as cv
 from esphome.const import (
+    CONF_GAIN_FACTOR,
     CONF_HUMIDITY,
     CONF_ID,
     CONF_OFFSET,
@@ -43,7 +44,6 @@ RhtAccelerationMode = sen5x_ns.enum("RhtAccelerationMode")
 CONF_ACCELERATION_MODE = "acceleration_mode"
 CONF_ALGORITHM_TUNING = "algorithm_tuning"
 CONF_AUTO_CLEANING_INTERVAL = "auto_cleaning_interval"
-CONF_GAIN_FACTOR = "gain_factor"
 CONF_GATING_MAX_DURATION_MINUTES = "gating_max_duration_minutes"
 CONF_INDEX_OFFSET = "index_offset"
 CONF_LEARNING_TIME_GAIN_HOURS = "learning_time_gain_hours"
diff --git a/esphome/components/sgp4x/sensor.py b/esphome/components/sgp4x/sensor.py
index 9317187df3..4f29248881 100644
--- a/esphome/components/sgp4x/sensor.py
+++ b/esphome/components/sgp4x/sensor.py
@@ -3,6 +3,7 @@ from esphome.components import i2c, sensirion_common, sensor
 import esphome.config_validation as cv
 from esphome.const import (
     CONF_COMPENSATION,
+    CONF_GAIN_FACTOR,
     CONF_ID,
     CONF_STORE_BASELINE,
     CONF_TEMPERATURE_SOURCE,
@@ -24,7 +25,6 @@ SGP4xComponent = sgp4x_ns.class_(
 )
 
 CONF_ALGORITHM_TUNING = "algorithm_tuning"
-CONF_GAIN_FACTOR = "gain_factor"
 CONF_GATING_MAX_DURATION_MINUTES = "gating_max_duration_minutes"
 CONF_HUMIDITY_SOURCE = "humidity_source"
 CONF_INDEX_OFFSET = "index_offset"
diff --git a/esphome/const.py b/esphome/const.py
index b2437eca7e..ffa5de2de3 100644
--- a/esphome/const.py
+++ b/esphome/const.py
@@ -333,6 +333,7 @@ CONF_FULL_SPECTRUM = "full_spectrum"
 CONF_FULL_SPECTRUM_COUNTS = "full_spectrum_counts"
 CONF_FULL_UPDATE_EVERY = "full_update_every"
 CONF_GAIN = "gain"
+CONF_GAIN_FACTOR = "gain_factor"
 CONF_GAMMA_CORRECT = "gamma_correct"
 CONF_GAS_RESISTANCE = "gas_resistance"
 CONF_GATEWAY = "gateway"