diff --git a/VpSharp/src/Coordinates.cs b/VpSharp/src/Coordinates.cs
index 04c1608..a0b2d9d 100644
--- a/VpSharp/src/Coordinates.cs
+++ b/VpSharp/src/Coordinates.cs
@@ -216,7 +216,7 @@ public readonly partial struct Coordinates : IEquatable<Coordinates>, IFormattab
     /// <returns>A <see cref="string" /> representation of these coordinates.</returns>
     public string ToString(string? format, IFormatProvider? formatProvider = null)
     {
-        format ??= "0";
+        format ??= "F";
         return Serializer.Serialize(this, format, formatProvider ?? CultureInfo.InvariantCulture);
     }
 }
diff --git a/VpSharp/src/Rotation.cs b/VpSharp/src/Rotation.cs
index c27c051..1e0d2e8 100644
--- a/VpSharp/src/Rotation.cs
+++ b/VpSharp/src/Rotation.cs
@@ -207,7 +207,7 @@ public readonly struct Rotation : IEquatable<Rotation>, IFormattable
     /// <returns>A <see cref="string" /> representation of these coordinates.</returns>
     public string ToString(string? format, IFormatProvider? formatProvider = null)
     {
-        format ??= "{0}";
+        format ??= "F";
         string separator = NumberFormatInfo.GetInstance(formatProvider).NumberGroupSeparator;
 
         using var builder = ZString.CreateUtf8StringBuilder();