diff --git a/egui/src/containers/area.rs b/egui/src/containers/area.rs
index 63b485a0..f7ab2f76 100644
--- a/egui/src/containers/area.rs
+++ b/egui/src/containers/area.rs
@@ -85,12 +85,13 @@ impl Area {
         self
     }
 
-    pub fn default_pos(mut self, default_pos: Pos2) -> Self {
-        self.default_pos = Some(default_pos);
+    pub fn default_pos(mut self, default_pos: impl Into<Pos2>) -> Self {
+        self.default_pos = Some(default_pos.into());
         self
     }
 
-    pub fn fixed_pos(mut self, fixed_pos: Pos2) -> Self {
+    pub fn fixed_pos(mut self, fixed_pos: impl Into<Pos2>) -> Self {
+        let fixed_pos = fixed_pos.into();
         self.default_pos = Some(fixed_pos);
         self.fixed_pos = Some(fixed_pos);
         self.movable = false;
diff --git a/egui/src/containers/resize.rs b/egui/src/containers/resize.rs
index 5f0e1a4b..d4299ce3 100644
--- a/egui/src/containers/resize.rs
+++ b/egui/src/containers/resize.rs
@@ -72,18 +72,18 @@ impl Resize {
         self
     }
 
-    pub fn default_size(mut self, default_size: Vec2) -> Self {
-        self.default_size = default_size;
+    pub fn default_size(mut self, default_size: impl Into<Vec2>) -> Self {
+        self.default_size = default_size.into();
         self
     }
 
-    pub fn min_size(mut self, min_size: Vec2) -> Self {
-        self.min_size = min_size;
+    pub fn min_size(mut self, min_size: impl Into<Vec2>) -> Self {
+        self.min_size = min_size.into();
         self
     }
 
-    pub fn max_size(mut self, max_size: Vec2) -> Self {
-        self.max_size = max_size;
+    pub fn max_size(mut self, max_size: impl Into<Vec2>) -> Self {
+        self.max_size = max_size.into();
         self
     }
 
@@ -108,7 +108,8 @@ impl Resize {
             .auto_expand_height(true)
     }
 
-    pub fn fixed_size(mut self, size: Vec2) -> Self {
+    pub fn fixed_size(mut self, size: impl Into<Vec2>) -> Self {
+        let size = size.into();
         self.auto_shrink_width = false;
         self.auto_shrink_height = false;
         self.expand_width_to_fit_content = false;
@@ -158,8 +159,8 @@ impl Resize {
     }
 
     /// Offset the position of the resize handle by this much
-    pub fn handle_offset(mut self, handle_offset: Vec2) -> Self {
-        self.handle_offset = handle_offset;
+    pub fn handle_offset(mut self, handle_offset: impl Into<Vec2>) -> Self {
+        self.handle_offset = handle_offset.into();
         self
     }
 
diff --git a/egui/src/containers/window.rs b/egui/src/containers/window.rs
index c51352ae..30e528c3 100644
--- a/egui/src/containers/window.rs
+++ b/egui/src/containers/window.rs
@@ -70,12 +70,12 @@ impl<'open> Window<'open> {
         self
     }
 
-    pub fn default_pos(mut self, default_pos: Pos2) -> Self {
+    pub fn default_pos(mut self, default_pos: impl Into<Pos2>) -> Self {
         self.area = self.area.default_pos(default_pos);
         self
     }
 
-    pub fn default_size(mut self, default_size: Vec2) -> Self {
+    pub fn default_size(mut self, default_size: impl Into<Vec2>) -> Self {
         self.resize = self.resize.default_size(default_size);
         self
     }
@@ -84,17 +84,17 @@ impl<'open> Window<'open> {
         self.default_pos(rect.min).default_size(rect.size())
     }
 
-    pub fn min_size(mut self, min_size: Vec2) -> Self {
+    pub fn min_size(mut self, min_size: impl Into<Vec2>) -> Self {
         self.resize = self.resize.min_size(min_size);
         self
     }
 
-    pub fn max_size(mut self, max_size: Vec2) -> Self {
+    pub fn max_size(mut self, max_size: impl Into<Vec2>) -> Self {
         self.resize = self.resize.max_size(max_size);
         self
     }
 
-    pub fn fixed_size(mut self, size: Vec2) -> Self {
+    pub fn fixed_size(mut self, size: impl Into<Vec2>) -> Self {
         self.resize = self.resize.fixed_size(size);
         self
     }
diff --git a/egui/src/examples/app.rs b/egui/src/examples/app.rs
index c538853e..274a167f 100644
--- a/egui/src/examples/app.rs
+++ b/egui/src/examples/app.rs
@@ -50,31 +50,31 @@ impl ExampleApp {
 
         Window::new("Examples")
             .open(&mut open_windows.examples)
-            .default_pos(pos2(32.0, 100.0))
-            .default_size(vec2(430.0, 600.0))
+            .default_pos([32.0, 100.0])
+            .default_size([430.0, 600.0])
             .show(ctx, |ui| {
                 example_window.ui(ui);
             });
 
         Window::new("Settings")
             .open(&mut open_windows.settings)
-            .default_pos(pos2(500.0, 100.0))
-            .default_size(vec2(350.0, 400.0))
+            .default_pos([500.0, 100.0])
+            .default_size([350.0, 400.0])
             .show(ctx, |ui| {
                 ctx.settings_ui(ui);
             });
 
         Window::new("Inspection")
             .open(&mut open_windows.inspection)
-            .default_pos(pos2(500.0, 400.0))
-            .default_size(vec2(400.0, 300.0))
+            .default_pos([500.0, 400.0])
+            .default_size([400.0, 300.0])
             .show(ctx, |ui| {
                 ctx.inspection_ui(ui);
             });
 
         Window::new("Memory")
             .open(&mut open_windows.memory)
-            .default_pos(pos2(700.0, 350.0))
+            .default_pos([700.0, 350.0])
             .auto_sized()
             .show(ctx, |ui| {
                 ctx.memory_ui(ui);
@@ -493,7 +493,7 @@ impl Default for LayoutExample {
 impl LayoutExample {
     pub fn ui(&mut self, ui: &mut Ui) {
         Resize::default()
-            .default_size(vec2(200.0, 200.0))
+            .default_size([200.0, 200.0])
             .show(ui, |ui| self.content_ui(ui));
     }
 
diff --git a/egui/src/math.rs b/egui/src/math.rs
index ddc8b96a..f6a25c23 100644
--- a/egui/src/math.rs
+++ b/egui/src/math.rs
@@ -12,6 +12,12 @@ pub fn vec2(x: f32, y: f32) -> Vec2 {
     Vec2 { x, y }
 }
 
+impl From<[f32; 2]> for Vec2 {
+    fn from(v: [f32; 2]) -> Self {
+        Self { x: v[0], y: v[1] }
+    }
+}
+
 impl Vec2 {
     pub fn zero() -> Self {
         Self { x: 0.0, y: 0.0 }
@@ -223,6 +229,12 @@ pub fn pos2(x: f32, y: f32) -> Pos2 {
     Pos2 { x, y }
 }
 
+impl From<[f32; 2]> for Pos2 {
+    fn from(v: [f32; 2]) -> Self {
+        Self { x: v[0], y: v[1] }
+    }
+}
+
 impl Pos2 {
     pub fn to_vec2(self) -> Vec2 {
         Vec2 {