diff --git a/BaseTools/Source/C/GenBootSector/GenBootSector.c b/BaseTools/Source/C/GenBootSector/GenBootSector.c
index 40cb19fb59..c218548a4c 100644
--- a/BaseTools/Source/C/GenBootSector/GenBootSector.c
+++ b/BaseTools/Source/C/GenBootSector/GenBootSector.c
@@ -278,7 +278,7 @@ GetBootSectorOffset (
 Description:
   Get the offset of boot sector.
   For non-MBR disk, offset is just 0
-  for disk with MBR, offset needs to be caculated by parsing MBR
+  for disk with MBR, offset needs to be calculated by parsing MBR
 
   NOTE: if no one is active, we will patch MBR to select first partition as active.
 
diff --git a/BaseTools/Source/C/GenFv/GenFvInternalLib.c b/BaseTools/Source/C/GenFv/GenFvInternalLib.c
index 10bb88b0a8..6ab8a24d4e 100644
--- a/BaseTools/Source/C/GenFv/GenFvInternalLib.c
+++ b/BaseTools/Source/C/GenFv/GenFvInternalLib.c
@@ -2787,7 +2787,7 @@ Returns:
   }
   
   //
-  // Caculate the required sizes for all FFS files.
+  // Calculate the required sizes for all FFS files.
   //
   CurrentOffset = sizeof (EFI_FIRMWARE_VOLUME_HEADER);
   
@@ -2904,7 +2904,7 @@ Returns:
     }
   }
   CurrentOffset += VtfFileSize;
-  DebugMsg (NULL, 0, 9, "FvImage size", "The caculated fv image size is 0x%x and the current set fv image size is 0x%x", (unsigned) CurrentOffset, (unsigned) FvInfoPtr->Size);
+  DebugMsg (NULL, 0, 9, "FvImage size", "The calculated fv image size is 0x%x and the current set fv image size is 0x%x", (unsigned) CurrentOffset, (unsigned) FvInfoPtr->Size);
   
   if (FvInfoPtr->Size == 0) { 
     //