diff --git a/selfdrive/hardware/hw.h b/selfdrive/hardware/hw.h
index d7a6c8d1d5..441c38d784 100644
--- a/selfdrive/hardware/hw.h
+++ b/selfdrive/hardware/hw.h
@@ -13,7 +13,7 @@
 class HardwarePC : public HardwareNone {
 public:
   static std::string get_os_version() { return "openpilot for PC"; }
-  static bool PC() { return true; }
+  static constexpr bool PC() { return true; }
   static bool TICI() { return util::getenv("TICI", 0) == 1; }
 };
 #define Hardware HardwarePC
diff --git a/selfdrive/ui/paint.cc b/selfdrive/ui/paint.cc
index 1bbbb8379c..858de5378a 100644
--- a/selfdrive/ui/paint.cc
+++ b/selfdrive/ui/paint.cc
@@ -151,72 +151,86 @@ static void ui_draw_world(UIState *s) {
   nvgResetScissor(s->vg);
 }
 
-static void ui_draw_vision_maxspeed(UIState *s) {
+static void ui_draw_vision_maxspeed(UIState *s, const float ratio) {
   const int SET_SPEED_NA = 255;
   float maxspeed = (*s->sm)["controlsState"].getControlsState().getVCruise();
   const bool is_cruise_set = maxspeed != 0 && maxspeed != SET_SPEED_NA;
   if (is_cruise_set && !s->scene.is_metric) { maxspeed *= KM_TO_MILE; }
 
-  const Rect rect = {bdr_s * 2, int(bdr_s * 1.5), 184, 202};
+  const Rect rect = {int(bdr_s * 2 * ratio), int(bdr_s * 1.5 * ratio),
+    int(184 * ratio), int(202 * ratio)};
   ui_fill_rect(s->vg, rect, COLOR_BLACK_ALPHA(100), 30.);
   ui_draw_rect(s->vg, rect, COLOR_WHITE_ALPHA(100), 10, 20.);
 
   nvgTextAlign(s->vg, NVG_ALIGN_CENTER | NVG_ALIGN_BASELINE);
-  ui_draw_text(s, rect.centerX(), 118, "MAX", 26 * 2.5, COLOR_WHITE_ALPHA(is_cruise_set ? 200 : 100), "sans-regular");
+  ui_draw_text(s, rect.centerX(), 118 * ratio, "MAX",
+      26 * 2.5 * ratio, COLOR_WHITE_ALPHA(is_cruise_set ? 200 : 100), "sans-regular");
   if (is_cruise_set) {
     const std::string maxspeed_str = std::to_string((int)std::nearbyint(maxspeed));
-    ui_draw_text(s, rect.centerX(), 212, maxspeed_str.c_str(), 48 * 2.5, COLOR_WHITE, "sans-bold");
+    ui_draw_text(s, rect.centerX(), 212 * ratio, maxspeed_str.c_str(),
+        48 * 2.5 * ratio, COLOR_WHITE, "sans-bold");
   } else {
-    ui_draw_text(s, rect.centerX(), 212, "N/A", 42 * 2.5, COLOR_WHITE_ALPHA(100), "sans-semibold");
+    ui_draw_text(s, rect.centerX(), 212 * ratio, "N/A",
+        42 * 2.5 * ratio, COLOR_WHITE_ALPHA(100), "sans-semibold");
   }
 }
 
-static void ui_draw_vision_speed(UIState *s) {
+static void ui_draw_vision_speed(UIState *s, const float ratio) {
   const float speed = std::max(0.0, (*s->sm)["carState"].getCarState().getVEgo() * (s->scene.is_metric ? MS_TO_KPH : MS_TO_MPH));
   const std::string speed_str = std::to_string((int)std::nearbyint(speed));
   nvgTextAlign(s->vg, NVG_ALIGN_CENTER | NVG_ALIGN_BASELINE);
-  ui_draw_text(s, s->fb_w/2, 210, speed_str.c_str(), 96 * 2.5, COLOR_WHITE, "sans-bold");
-  ui_draw_text(s, s->fb_w/2, 290, s->scene.is_metric ? "km/h" : "mph", 36 * 2.5, COLOR_WHITE_ALPHA(200), "sans-regular");
+  ui_draw_text(s, s->fb_w/2, 210 * ratio, speed_str.c_str(),
+      96 * 2.5 * ratio, COLOR_WHITE, "sans-bold");
+  ui_draw_text(s, s->fb_w/2, 290 * ratio, s->scene.is_metric ? "km/h" : "mph",
+      36 * 2.5 * ratio, COLOR_WHITE_ALPHA(200), "sans-regular");
 }
 
-static void ui_draw_vision_event(UIState *s) {
+static void ui_draw_vision_event(UIState *s, const float ratio) {
   if (s->scene.engageable) {
     // draw steering wheel
-    const int radius = 96;
-    const int center_x = s->fb_w - radius - bdr_s * 2;
-    const int center_y = radius  + (bdr_s * 1.5);
+    const int radius = 96 * ratio;
+    const int center_x = s->fb_w - radius - (bdr_s * ratio* 2);
+    const int center_y = radius  + (bdr_s * ratio * 1.5);
     const QColor &color = bg_colors[s->status];
     NVGcolor nvg_color = nvgRGBA(color.red(), color.green(), color.blue(), color.alpha());
     ui_draw_circle_image(s, center_x, center_y, radius, "wheel", nvg_color, 1.0f);
   }
 }
 
-static void ui_draw_vision_face(UIState *s) {
-  const int radius = 96;
-  const int center_x = radius + (bdr_s * 2);
-  const int center_y = s->fb_h - footer_h / 2;
+static void ui_draw_vision_face(UIState *s, const float ratio) {
+  const int radius = 96 * ratio;
+  const int center_x = radius + (bdr_s * ratio * 2);
+  const int center_y = s->fb_h - (footer_h * ratio / 2);
   ui_draw_circle_image(s, center_x, center_y, radius, "driver_face", s->scene.dm_active);
 }
 
-static void ui_draw_vision_header(UIState *s) {
+static void ui_draw_vision_header(UIState *s, const float ratio) {
   NVGpaint gradient = nvgLinearGradient(s->vg, 0, header_h - (header_h / 2.5), 0, header_h,
                                         nvgRGBAf(0, 0, 0, 0.45), nvgRGBAf(0, 0, 0, 0));
   ui_fill_rect(s->vg, {0, 0, s->fb_w , header_h}, gradient);
-  ui_draw_vision_maxspeed(s);
-  ui_draw_vision_speed(s);
-  ui_draw_vision_event(s);
+  ui_draw_vision_maxspeed(s, ratio);
+  ui_draw_vision_speed(s, ratio);
+  ui_draw_vision_event(s, ratio);
 }
 
-static void ui_draw_vision(UIState *s) {
+static void ui_draw_vision(UIState *s, const float ratio) {
   const UIScene *scene = &s->scene;
   // Draw augmented elements
   if (scene->world_objects_visible) {
     ui_draw_world(s);
   }
   // Set Speed, Current Speed, Status/Events
-  ui_draw_vision_header(s);
+  ui_draw_vision_header(s, ratio);
   if ((*s->sm)["controlsState"].getControlsState().getAlertSize() == cereal::ControlsState::AlertSize::NONE) {
-    ui_draw_vision_face(s);
+    ui_draw_vision_face(s, ratio);
+  }
+}
+
+inline float resize_ratio(int w, int h) {
+  if constexpr (Hardware::PC()) {
+    return std::min<int>(w, h) / 1080.0; // 1080 is min of default 1920 x 1080
+  } else {
+    return 1.0;
   }
 }
 
@@ -228,7 +242,7 @@ void ui_draw(UIState *s, int w, int h) {
   glEnable(GL_BLEND);
   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
   nvgBeginFrame(s->vg, s->fb_w, s->fb_h, 1.0f);
-  ui_draw_vision(s);
+  ui_draw_vision(s, resize_ratio(w, h));
   nvgEndFrame(s->vg);
   glDisable(GL_BLEND);
 }
diff --git a/selfdrive/ui/qt/offroad/driverview.cc b/selfdrive/ui/qt/offroad/driverview.cc
index db2a4d6b40..9633c1a705 100644
--- a/selfdrive/ui/qt/offroad/driverview.cc
+++ b/selfdrive/ui/qt/offroad/driverview.cc
@@ -52,8 +52,10 @@ void DriverViewScene::paintEvent(QPaintEvent* event) {
   if (!frame_updated) {
     p.setPen(Qt::white);
     p.setRenderHint(QPainter::TextAntialiasing);
-    configFont(p, "Inter", 100, "Bold");
-    p.drawText(geometry(), Qt::AlignCenter, "camera starting");
+    const QRect r(geometry());
+    const QString text("camera starting");
+    configFont(p, r, "Inter", 100, "Bold", text);
+    p.drawText(geometry(), Qt::AlignCenter, text);
     return;
   }
 
diff --git a/selfdrive/ui/qt/onroad.cc b/selfdrive/ui/qt/onroad.cc
index 7c3a610eed..ab42c80818 100644
--- a/selfdrive/ui/qt/onroad.cc
+++ b/selfdrive/ui/qt/onroad.cc
@@ -122,18 +122,60 @@ void OnroadAlerts::updateAlert(const Alert &a, const QColor &color) {
   }
 }
 
+struct Rects
+{
+  int x, y, w, h;     // bounding box for total text area
+  int x1, y1, w1, h1; // bounding box for alert text 1
+  int x2, y2, w2, h2; // bounding box for alert text 2
+
+  Rects()
+  {
+    memset(this, 0, sizeof(Rects));
+  }
+};
+
+template<typename T>
+void getRects(T t, Rects &r, Alert alert) {
+  // returns bounding boxes for text area, alert1, alert2
+  // w - width, h - height, windows starting position x, y
+
+  const int heightMax = 1080; // adjust to change text box scale
+  const int width = t->width();
+  const int height = t->height();
+
+  switch (alert.size) {
+    case cereal::ControlsState::AlertSize::SMALL:
+      r.h = height * (271.0 / heightMax);
+      break;
+    case cereal::ControlsState::AlertSize::MID:
+      r.h = height * (420.0 / heightMax);
+      break;
+    case cereal::ControlsState::AlertSize::FULL:
+      r.h = height;
+      break;
+    case cereal::ControlsState::AlertSize::NONE:
+      break;
+  }
+
+  r.w = width;
+  r.w1 = r.w;
+  r.w2 = r.w1;
+
+  r.h1 = r.h / 2.0;
+  r.h2 = r.h1;
+
+  r.y = height - r.h;
+  r.y1 = r.y;
+  r.y2 = r.y1 + r.h1;
+}
+
 void OnroadAlerts::paintEvent(QPaintEvent *event) {
   if (alert.size == cereal::ControlsState::AlertSize::NONE) {
     return;
   }
-  static std::map<cereal::ControlsState::AlertSize, const int> alert_sizes = {
-    {cereal::ControlsState::AlertSize::SMALL, 271},
-    {cereal::ControlsState::AlertSize::MID, 420},
-    {cereal::ControlsState::AlertSize::FULL, height()},
-  };
-  int h = alert_sizes[alert.size];
-  QRect r = QRect(0, height() - h, width(), h);
-
+  Rects R;
+  getRects(this, R, alert);
+  QRect r = QRect(R.x, R.y, R.w, R.h);
   QPainter p(this);
 
   // draw background + gradient
@@ -153,23 +195,28 @@ void OnroadAlerts::paintEvent(QPaintEvent *event) {
   p.setCompositionMode(QPainter::CompositionMode_SourceOver);
 
   // text
-  const QPoint c = r.center();
   p.setPen(QColor(0xff, 0xff, 0xff));
   p.setRenderHint(QPainter::TextAntialiasing);
+
+  const QRect a1 = QRect(R.x1, R.y1, R.w1, R.h1);
+  const QRect a2 = QRect(R.x2, R.y2, R.w2, R.h2);
+
+  const int textBoxFlag = Qt::AlignCenter;
+
   if (alert.size == cereal::ControlsState::AlertSize::SMALL) {
-    configFont(p, "Open Sans", 74, "SemiBold");
-    p.drawText(r, Qt::AlignCenter, alert.text1);
+    configFont(p, r, "Open Sans", 74, "SemiBold", alert.text1);
+    p.drawText(r, textBoxFlag, alert.text1);
   } else if (alert.size == cereal::ControlsState::AlertSize::MID) {
-    configFont(p, "Open Sans", 88, "Bold");
-    p.drawText(QRect(0, c.y() - 125, width(), 150), Qt::AlignHCenter | Qt::AlignTop, alert.text1);
-    configFont(p, "Open Sans", 66, "Regular");
-    p.drawText(QRect(0, c.y() + 21, width(), 90), Qt::AlignHCenter, alert.text2);
+    configFont(p, a1, "Open Sans", 88, "Bold", alert.text1);
+    p.drawText(a1, textBoxFlag, alert.text1);
+    configFont(p, a2, "Open Sans", 66, "Regular", alert.text2);
+    p.drawText(a2, textBoxFlag, alert.text2);
   } else if (alert.size == cereal::ControlsState::AlertSize::FULL) {
     bool l = alert.text1.length() > 15;
-    configFont(p, "Open Sans", l ? 132 : 177, "Bold");
-    p.drawText(QRect(0, r.y() + (l ? 240 : 270), width(), 600), Qt::AlignHCenter | Qt::TextWordWrap, alert.text1);
-    configFont(p, "Open Sans", 88, "Regular");
-    p.drawText(QRect(0, r.height() - (l ? 361 : 420), width(), 300), Qt::AlignHCenter | Qt::TextWordWrap, alert.text2);
+    configFont(p, a1, "Open Sans", l ? 132 : 177, "Bold", alert.text1);
+    p.drawText(a1, textBoxFlag, alert.text1);
+    configFont(p, a2, "Open Sans", 88, "Regular", alert.text2);
+    p.drawText(a2, textBoxFlag, alert.text2);
   }
 }
 
diff --git a/selfdrive/ui/qt/qt_window.cc b/selfdrive/ui/qt/qt_window.cc
index aad21e6c06..2c48bdde39 100644
--- a/selfdrive/ui/qt/qt_window.cc
+++ b/selfdrive/ui/qt/qt_window.cc
@@ -3,9 +3,14 @@
 void setMainWindow(QWidget *w) {
   const bool wide = (QGuiApplication::primaryScreen()->size().width() >= WIDE_WIDTH) ^
                     (getenv("INVERT_WIDTH") != NULL);
-  const float scale = util::getenv("SCALE", 1.0f);
+  if constexpr (Hardware::PC()) {
+    w->setMinimumSize(QSize(640, 480));
+    w->setMaximumSize(QSize(WIDE_WIDTH, 1080));
+    w->resize(QSize(1920, 1080));
+  } else {
+    w->setFixedSize(QSize(wide ? WIDE_WIDTH : 1920, 1080));
+  }
 
-  w->setFixedSize(QSize(wide ? WIDE_WIDTH : 1920, 1080) * scale);
   w->show();
 
 #ifdef QCOM2
diff --git a/selfdrive/ui/qt/sidebar.cc b/selfdrive/ui/qt/sidebar.cc
index cd53a5b725..43cb60a5fe 100644
--- a/selfdrive/ui/qt/sidebar.cc
+++ b/selfdrive/ui/qt/sidebar.cc
@@ -20,8 +20,8 @@ void Sidebar::drawMetric(QPainter &p, const QString &label, QColor c, int y) {
   p.drawRoundedRect(rect, 20, 20);
 
   p.setPen(QColor(0xff, 0xff, 0xff));
-  configFont(p, "Open Sans", 35, "Bold");
   const QRect r = QRect(rect.x() + 30, rect.y(), rect.width() - 40, rect.height());
+  configFont(p, r, "Open Sans", 35, "Bold", label);
   p.drawText(r, Qt::AlignCenter, label);
 }
 
@@ -99,9 +99,9 @@ void Sidebar::paintEvent(QPaintEvent *event) {
     x += 37;
   }
 
-  configFont(p, "Open Sans", 35, "Regular");
   p.setPen(QColor(0xff, 0xff, 0xff));
   const QRect r = QRect(50, 247, 100, 50);
+  configFont(p, r, "Open Sans", 35, "Regular", net_type);
   p.drawText(r, Qt::AlignCenter, net_type);
 
   // metrics
diff --git a/selfdrive/ui/qt/util.cc b/selfdrive/ui/qt/util.cc
index 93bb2b0e79..5187ddc776 100644
--- a/selfdrive/ui/qt/util.cc
+++ b/selfdrive/ui/qt/util.cc
@@ -33,6 +33,32 @@ void configFont(QPainter &p, const QString &family, int size, const QString &sty
   p.setFont(f);
 }
 
+void configFont(QPainter &p, const QRect &r, const QString &family, int size,
+    const QString &style, const QString &text) {
+  if constexpr (Hardware::PC()) {
+    int szTemp = 1;
+    QFont f(family);
+    f.setStyleName(style);
+    while (true) {
+      f.setPixelSize(szTemp);
+      QRect rTemp = QFontMetrics(f).boundingRect(r, Qt::AlignCenter, text);
+      if (rTemp.height() < r.height() &&
+          rTemp.width() < r.width() &&
+          szTemp <= size) {
+        ++szTemp;
+      } else {
+        p.setFont(f);
+        return;
+      }
+    }
+  } else {
+    QFont f(family);
+    f.setPixelSize(size);
+    f.setStyleName(style);
+    p.setFont(f);
+  }
+}
+
 void clearLayout(QLayout* layout) {
   while (QLayoutItem* item = layout->takeAt(0)) {
     if (QWidget* widget = item->widget()) {
diff --git a/selfdrive/ui/qt/util.h b/selfdrive/ui/qt/util.h
index ad28b51166..ecdbab4319 100644
--- a/selfdrive/ui/qt/util.h
+++ b/selfdrive/ui/qt/util.h
@@ -13,6 +13,8 @@ QString getBrand();
 QString getBrandVersion();
 std::optional<QString> getDongleId();
 void configFont(QPainter &p, const QString &family, int size, const QString &style);
+void configFont(QPainter &p, const QRect &r, const QString &family, int size,
+    const QString &style, const QString &text);
 void clearLayout(QLayout* layout);
 void setQtSurfaceFormat();
 QString timeAgo(const QDateTime &date);