diff --git a/esphome/helpers.py b/esphome/helpers.py
index 9bb57b6468..7f0f340454 100644
--- a/esphome/helpers.py
+++ b/esphome/helpers.py
@@ -31,6 +31,13 @@ SockAddr = IPv4SockAddr | IPv6SockAddr
 
 _LOGGER = logging.getLogger(__name__)
 
+# cv.boolean's closed spelling tables, shared with the env-knob parsing below
+TRUTHY_BOOL_STRINGS = frozenset({"true", "yes", "on", "enable"})
+FALSY_BOOL_STRINGS = frozenset({"false", "no", "off", "disable"})
+# cv.boolean's spelling tables plus the 1/0 env convention
+TRUTHY_ENV_STRINGS = TRUTHY_BOOL_STRINGS | {"1"}
+FALSY_ENV_STRINGS = FALSY_BOOL_STRINGS | {"0"}
+
 IS_MACOS = platform.system() == "Darwin"
 IS_WINDOWS = platform.system() == "Windows"
 IS_LINUX = platform.system() == "Linux"
@@ -400,9 +407,9 @@ def get_bool_env(var, default=False):
     value = os.getenv(var, default)
     if isinstance(value, str):
         value = value.lower()
-        if value in ("1", "true", "yes", "on", "enable"):
+        if value in TRUTHY_ENV_STRINGS:
             return True
-        if value in ("0", "false", "no", "off", "disable"):
+        if value in FALSY_ENV_STRINGS:
             return False
     return bool(value)