diff --git a/selfdrive/ui/qt/onroad/annotated_camera.cc b/selfdrive/ui/qt/onroad/annotated_camera.cc
index 07890b415..950416abb 100644
--- a/selfdrive/ui/qt/onroad/annotated_camera.cc
+++ b/selfdrive/ui/qt/onroad/annotated_camera.cc
@@ -733,14 +733,14 @@ void AnnotatedCameraWidget::initializeFrogPilotWidgets() {
 }
 
 void AnnotatedCameraWidget::paintFrogPilotWidgets(QPainter &painter, const UIScene &scene) {
-  if (is_metric) {
+  if (is_metric || useSI) {
     accelerationUnit = tr(" m/s²");
     leadDistanceUnit = tr(mapOpen ? "m" : "meters");
-    leadSpeedUnit = tr("kph");
+    leadSpeedUnit = useSI ? tr("m/s") : tr("kph");
 
     accelerationConversion = 1.0f;
     distanceConversion = 1.0f;
-    speedConversion = MS_TO_KPH;
+    speedConversion = useSI ? 1.0f : MS_TO_KPH;
   } else {
     accelerationUnit = tr(" ft/s²");
     leadDistanceUnit = tr(mapOpen ? "ft" : "feet");
@@ -850,6 +850,8 @@ void AnnotatedCameraWidget::paintFrogPilotWidgets(QPainter &painter, const UISce
     animationTimer->stop();
   }
 
+  useSI = scene.use_si;
+
   if (currentHolidayTheme != scene.current_holiday_theme || customSignals != scene.custom_signals) {
     currentHolidayTheme = scene.current_holiday_theme;
     customSignals = scene.custom_signals;
diff --git a/selfdrive/ui/qt/onroad/annotated_camera.h b/selfdrive/ui/qt/onroad/annotated_camera.h
index c56eef406..9c640a116 100644
--- a/selfdrive/ui/qt/onroad/annotated_camera.h
+++ b/selfdrive/ui/qt/onroad/annotated_camera.h
@@ -124,6 +124,7 @@ private:
   bool trafficModeActive;
   bool turnSignalLeft;
   bool turnSignalRight;
+  bool useSI;
   bool useViennaSLCSign;
   bool vtscControllingCurve;
 
diff --git a/selfdrive/ui/ui.cc b/selfdrive/ui/ui.cc
index bde006211..9c088e497 100644
--- a/selfdrive/ui/ui.cc
+++ b/selfdrive/ui/ui.cc
@@ -370,6 +370,7 @@ void ui_update_frogpilot_params(UIState *s) {
   scene.is_memory = scene.sidebar_metrics && params.getBool("ShowMemoryUsage");
   scene.is_storage_left = scene.sidebar_metrics && params.getBool("ShowStorageLeft");
   scene.is_storage_used = scene.sidebar_metrics && params.getBool("ShowStorageUsed");
+  scene.use_si = developer_ui && params.getBool("UseSI");
 
   scene.disable_smoothing_mtsc = params.getBool("MTSCEnabled") && params.getBool("DisableMTSCSmoothing");
   scene.disable_smoothing_vtsc = params.getBool("VisionTurnControl") && params.getBool("DisableVTSCSmoothing");
diff --git a/selfdrive/ui/ui.h b/selfdrive/ui/ui.h
index 1c8a932fe..b5dd04e5e 100644
--- a/selfdrive/ui/ui.h
+++ b/selfdrive/ui/ui.h
@@ -185,6 +185,7 @@ typedef struct UIScene {
   bool turn_signal_left;
   bool turn_signal_right;
   bool use_kaofui_icons;
+  bool use_si;
   bool use_vienna_slc_sign;
   bool vtsc_controlling_curve;