diff --git a/Ooui.Forms/Extensions/FontExtensions.cs b/Ooui.Forms/Extensions/FontExtensions.cs
index 310ece6..8c53312 100644
--- a/Ooui.Forms/Extensions/FontExtensions.cs
+++ b/Ooui.Forms/Extensions/FontExtensions.cs
@@ -44,9 +44,23 @@ namespace Ooui.Forms.Extensions
                 return Size.Zero;
 
             var fontHeight = fontSize;
-            var charWidth = fontSize * 0.5;
 
-            var width = text.Length * charWidth;
+            var isBold = fontAttrs.HasFlag (FontAttributes.Bold);
+
+            var props = isBold ? BoldCharacterProportions : CharacterProportions;
+            var avgp = isBold ? BoldAverageCharProportion : AverageCharProportion;
+
+            var pwidth = 1.0e-6; // Tiny little padding to account for sampling errors
+            for (var i = 0; i < text.Length; i++) {
+                var c = (int)text[i];
+                if (c < 128) {
+                    pwidth += props[c];
+                }
+                else {
+                    pwidth += avgp;
+                }
+            }
+            var width = fontSize * pwidth;
 
             return new Size (width, fontHeight);
         }
@@ -69,5 +83,44 @@ namespace Ooui.Forms.Extensions
             }
         }
 
+        static readonly double[] CharacterProportions = {
+            0, 0, 0, 0, 0, 0, 0, 0,
+            0, 0.27799999713897705, 0.27799999713897705, 0.27799999713897705, 0.27799999713897705, 0.27799999713897705, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0,
+            0.27799999713897705, 0.25899994373321533, 0.4259999990463257, 0.5560001134872437, 0.5560001134872437, 1.0000001192092896, 0.6299999952316284, 0.27799999713897705,
+            0.25899994373321533, 0.25899994373321533, 0.3520001173019409, 0.6000000238418579, 0.27799999713897705, 0.3890000581741333, 0.27799999713897705, 0.3330000638961792,
+            0.5560001134872437, 0.5560001134872437, 0.5560001134872437, 0.5560001134872437, 0.5560001134872437, 0.5560001134872437, 0.5560001134872437, 0.5560001134872437,
+            0.5560001134872437, 0.5560001134872437, 0.27799999713897705, 0.27799999713897705, 0.6000000238418579, 0.6000000238418579, 0.6000000238418579, 0.5560001134872437,
+            0.8000000715255737, 0.6480001211166382, 0.6850000619888306, 0.722000002861023, 0.7040001153945923, 0.6110001802444458, 0.5740000009536743, 0.7589999437332153,
+            0.722000002861023, 0.25899994373321533, 0.5190001726150513, 0.6669999361038208, 0.5560001134872437, 0.8709999322891235, 0.722000002861023, 0.7600001096725464,
+            0.6480001211166382, 0.7600001096725464, 0.6850000619888306, 0.6480001211166382, 0.5740000009536743, 0.722000002861023, 0.6110001802444458, 0.9259999990463257,
+            0.6110001802444458, 0.6480001211166382, 0.6110001802444458, 0.25899994373321533, 0.3330000638961792, 0.25899994373321533, 0.6000000238418579, 0.5000001192092896,
+            0.22200000286102295, 0.5370000600814819, 0.593000054359436, 0.5370000600814819, 0.593000054359436, 0.5370000600814819, 0.2960001230239868, 0.5740000009536743,
+            0.5560001134872437, 0.22200000286102295, 0.22200000286102295, 0.5190001726150513, 0.22200000286102295, 0.8530000448226929, 0.5560001134872437, 0.5740000009536743,
+            0.593000054359436, 0.593000054359436, 0.3330000638961792, 0.5000001192092896, 0.31500017642974854, 0.5560001134872437, 0.5000001192092896, 0.7580000162124634,
+            0.5180000066757202, 0.5000001192092896, 0.4800001382827759, 0.3330000638961792, 0.22200000286102295, 0.3330000638961792, 0.6000000238418579, 0
+        };
+        const double AverageCharProportion = 0.5131400561332703;
+
+        static readonly double[] BoldCharacterProportions = {
+            0, 0, 0, 0, 0, 0, 0, 0,
+            0, 0.27799999713897705, 0.27799999713897705, 0.27799999713897705, 0.27799999713897705, 0.27799999713897705, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0,
+            0.27799999713897705, 0.27799999713897705, 0.46299993991851807, 0.5560001134872437, 0.5560001134872437, 1.0000001192092896, 0.6850000619888306, 0.27799999713897705,
+            0.2960001230239868, 0.2960001230239868, 0.40700018405914307, 0.6000000238418579, 0.27799999713897705, 0.40700018405914307, 0.27799999713897705, 0.37099993228912354,
+            0.5560001134872437, 0.5560001134872437, 0.5560001134872437, 0.5560001134872437, 0.5560001134872437, 0.5560001134872437, 0.5560001134872437, 0.5560001134872437,
+            0.5560001134872437, 0.5560001134872437, 0.27799999713897705, 0.27799999713897705, 0.6000000238418579, 0.6000000238418579, 0.6000000238418579, 0.5560001134872437,
+            0.8000000715255737, 0.6850000619888306, 0.7040001153945923, 0.7410000562667847, 0.7410000562667847, 0.6480001211166382, 0.593000054359436, 0.7589999437332153,
+            0.7410000562667847, 0.29499995708465576, 0.5560001134872437, 0.722000002861023, 0.593000054359436, 0.9070001840591431, 0.7410000562667847, 0.777999997138977,
+            0.6669999361038208, 0.777999997138977, 0.722000002861023, 0.6490000486373901, 0.6110001802444458, 0.7410000562667847, 0.6299999952316284, 0.9440001249313354,
+            0.6669999361038208, 0.6669999361038208, 0.6480001211166382, 0.3330000638961792, 0.37099993228912354, 0.3330000638961792, 0.6000000238418579, 0.5000001192092896,
+            0.25899994373321533, 0.5740000009536743, 0.6110001802444458, 0.5740000009536743, 0.6110001802444458, 0.5740000009536743, 0.3330000638961792, 0.6110001802444458,
+            0.593000054359436, 0.2580000162124634, 0.27799999713897705, 0.5740000009536743, 0.2580000162124634, 0.906000018119812, 0.593000054359436, 0.6110001802444458,
+            0.6110001802444458, 0.6110001802444458, 0.3890000581741333, 0.5370000600814819, 0.3520001173019409, 0.593000054359436, 0.5200001001358032, 0.8140000104904175,
+            0.5370000600814819, 0.5190001726150513, 0.5190001726150513, 0.3330000638961792, 0.223000168800354, 0.3330000638961792, 0.6000000238418579, 0
+        };
+        const double BoldAverageCharProportion = 0.5346300601959229;
     }
 }
diff --git a/Samples/DisplayAlertPage.xaml b/Samples/DisplayAlertPage.xaml
index fd29d53..ca53abc 100644
--- a/Samples/DisplayAlertPage.xaml
+++ b/Samples/DisplayAlertPage.xaml
@@ -4,7 +4,8 @@
              x:Class="Samples.DisplayAlertPage">
     <ContentPage.Content>
         <StackLayout>
-            <Label Text="Welcome to DisplayAlert Sample!" FontSize="32" FontAttributes="Bold" Margin="10,10,10,50" />
+            <Label Text="Welcome to DisplayAlert Sample!" FontSize="32" FontAttributes="Bold" Margin="10,10,10,50"
+                HorizontalOptions="Center"/>
             <ActivityIndicator x:Name="activity" />
             <ProgressBar x:Name="progress" />
             <DatePicker x:Name="datePicker" />
diff --git a/Samples/Program.cs b/Samples/Program.cs
index e5ff7e5..7a3f706 100644
--- a/Samples/Program.cs
+++ b/Samples/Program.cs
@@ -32,7 +32,7 @@ namespace Samples
             new DisplayAlertSample ().Publish ();
             new EditorSample().Publish();
 
-            UI.Present ("/draw");
+            UI.Present ("/display-alert");
 
             Console.ReadLine ();
         }