diff --git a/basis/images/images.factor b/basis/images/images.factor
index c2dc33608e..5ac0da7a28 100644
--- a/basis/images/images.factor
+++ b/basis/images/images.factor
@@ -9,6 +9,24 @@ IN: images
 SINGLETONS: BGR RGB BGRA RGBA ABGR ARGB RGBX XRGB BGRX XBGR
 R16G16B16 R32G32B32 R16G16B16A16 R32G32B32A32 ;
 
+: bytes-per-pixel ( component-order -- n )
+    {
+        { BGR [ 3 ] }
+        { RGB [ 3 ] }
+        { BGRA [ 4 ] }
+        { RGBA [ 4 ] }
+        { ABGR [ 4 ] }
+        { ARGB [ 4 ] }
+        { RGBX [ 4 ] }
+        { XRGB [ 4 ] }
+        { BGRX [ 4 ] }
+        { XBGR [ 4 ] }
+        { R16G16B16 [ 6 ] }
+        { R32G32B32 [ 12 ] }
+        { R16G16B16A16 [ 8 ] }
+        { R32G32B32A32 [ 16 ] }
+    } case ;
+
 TUPLE: image dim component-order bitmap ;
 
 : <image> ( -- image ) image new ; inline
@@ -63,4 +81,4 @@ M: image normalize-scan-line-order ;
 : normalize-image ( image -- image )
     [ >byte-array ] change-bitmap
     normalize-component-order
-    normalize-scan-line-order ;
+    normalize-scan-line-order ;
\ No newline at end of file