diff --git a/frigate/config/ui.py b/frigate/config/ui.py
index a562edf61..2f66aeed3 100644
--- a/frigate/config/ui.py
+++ b/frigate/config/ui.py
@@ -5,7 +5,7 @@ from pydantic import Field
 
 from .base import FrigateBaseModel
 
-__all__ = ["TimeFormatEnum", "DateTimeStyleEnum", "UIConfig"]
+__all__ = ["TimeFormatEnum", "DateTimeStyleEnum", "UnitSystemEnum", "UIConfig"]
 
 
 class TimeFormatEnum(str, Enum):
@@ -21,6 +21,11 @@ class DateTimeStyleEnum(str, Enum):
     short = "short"
 
 
+class UnitSystemEnum(str, Enum):
+    imperial = "imperial"
+    metric = "metric"
+
+
 class UIConfig(FrigateBaseModel):
     timezone: Optional[str] = Field(default=None, title="Override UI timezone.")
     time_format: TimeFormatEnum = Field(
@@ -35,3 +40,6 @@ class UIConfig(FrigateBaseModel):
     strftime_fmt: Optional[str] = Field(
         default=None, title="Override date and time format using strftime syntax."
     )
+    unit_system: UnitSystemEnum = Field(
+        default=UnitSystemEnum.metric, title="The unit system to use for measurements."
+    )
diff --git a/web/src/types/frigateConfig.ts b/web/src/types/frigateConfig.ts
index 45bb39475..1220412a8 100644
--- a/web/src/types/frigateConfig.ts
+++ b/web/src/types/frigateConfig.ts
@@ -8,6 +8,7 @@ export interface UiConfig {
   strftime_fmt?: string;
   dashboard: boolean;
   order: number;
+  unit_system?: "metric" | "imperial";
 }
 
 export interface BirdseyeConfig {