diff --git a/src/NadekoBot/Modules/Utility/Commands/UnitConversion.cs b/src/NadekoBot/Modules/Utility/Commands/UnitConversion.cs
index d4f9df0c..12a4b8f3 100644
--- a/src/NadekoBot/Modules/Utility/Commands/UnitConversion.cs
+++ b/src/NadekoBot/Modules/Utility/Commands/UnitConversion.cs
@@ -148,10 +148,10 @@ namespace NadekoBot.Modules.Utility
                             break;
                     }
                     //from Kelvin to target
-                    switch (targetUnit.Triggers.First())
+                    switch (targetUnit.Triggers.First().ToUpperInvariant())
                     {
                         case "C":
-                            res = value - 273.15m; //celcius!
+                            res = res - 273.15m; //celcius!
                             break;
                         case "F":
                             res = res * (9m / 5m) - 459.67m;