diff --git a/esphome/components/atm90e26/sensor.py b/esphome/components/atm90e26/sensor.py
index a702e23cf0..42ef259100 100644
--- a/esphome/components/atm90e26/sensor.py
+++ b/esphome/components/atm90e26/sensor.py
@@ -1,34 +1,34 @@
 import esphome.codegen as cg
-import esphome.config_validation as cv
 from esphome.components import sensor, spi
+import esphome.config_validation as cv
 from esphome.const import (
-    CONF_ID,
-    CONF_REACTIVE_POWER,
-    CONF_VOLTAGE,
     CONF_CURRENT,
+    CONF_FORWARD_ACTIVE_ENERGY,
+    CONF_FREQUENCY,
+    CONF_ID,
+    CONF_LINE_FREQUENCY,
     CONF_POWER,
     CONF_POWER_FACTOR,
-    CONF_FREQUENCY,
-    CONF_FORWARD_ACTIVE_ENERGY,
+    CONF_REACTIVE_POWER,
     CONF_REVERSE_ACTIVE_ENERGY,
+    CONF_VOLTAGE,
     DEVICE_CLASS_CURRENT,
     DEVICE_CLASS_ENERGY,
     DEVICE_CLASS_POWER,
     DEVICE_CLASS_POWER_FACTOR,
     DEVICE_CLASS_VOLTAGE,
-    ICON_LIGHTBULB,
     ICON_CURRENT_AC,
+    ICON_LIGHTBULB,
     STATE_CLASS_MEASUREMENT,
     STATE_CLASS_TOTAL_INCREASING,
+    UNIT_AMPERE,
     UNIT_HERTZ,
     UNIT_VOLT,
-    UNIT_AMPERE,
-    UNIT_WATT,
     UNIT_VOLT_AMPS_REACTIVE,
+    UNIT_WATT,
     UNIT_WATT_HOURS,
 )
 
-CONF_LINE_FREQUENCY = "line_frequency"
 CONF_METER_CONSTANT = "meter_constant"
 CONF_PL_CONST = "pl_const"
 CONF_GAIN_PGA = "gain_pga"
diff --git a/esphome/components/atm90e32/sensor.py b/esphome/components/atm90e32/sensor.py
index be2196223c..0dc3bfdc4f 100644
--- a/esphome/components/atm90e32/sensor.py
+++ b/esphome/components/atm90e32/sensor.py
@@ -7,6 +7,7 @@ from esphome.const import (
     CONF_FORWARD_ACTIVE_ENERGY,
     CONF_FREQUENCY,
     CONF_ID,
+    CONF_LINE_FREQUENCY,
     CONF_PHASE_A,
     CONF_PHASE_ANGLE,
     CONF_PHASE_B,
@@ -39,7 +40,6 @@ from esphome.const import (
 
 from . import atm90e32_ns
 
-CONF_LINE_FREQUENCY = "line_frequency"
 CONF_CHIP_TEMPERATURE = "chip_temperature"
 CONF_GAIN_PGA = "gain_pga"
 CONF_CURRENT_PHASES = "current_phases"
diff --git a/esphome/const.py b/esphome/const.py
index b9c37a53a8..6e29667887 100644
--- a/esphome/const.py
+++ b/esphome/const.py
@@ -431,6 +431,7 @@ CONF_LIGHT_ID = "light_id"
 CONF_LIGHTNING_ENERGY = "lightning_energy"
 CONF_LIGHTNING_THRESHOLD = "lightning_threshold"
 CONF_LIMIT_MODE = "limit_mode"
+CONF_LINE_FREQUENCY = "line_frequency"
 CONF_LINE_THICKNESS = "line_thickness"
 CONF_LINE_TYPE = "line_type"
 CONF_LOADED_INTEGRATIONS = "loaded_integrations"