diff --git a/src/v_video.cpp b/src/v_video.cpp
index dcc5789eee..acd34f37f8 100644
--- a/src/v_video.cpp
+++ b/src/v_video.cpp
@@ -1721,6 +1721,26 @@ const int BaseRatioSizes[7][4] =
 	{ 1707, 338, 0,                   48*9/16 }     	// 21:9   568.8889, 337.5,    multiplied by three
 };
 
+int AspectBaseWidth(float aspect)
+{
+	return (int)round(240.0f * aspect * 3.0f);
+}
+
+int AspectBaseHeight(float aspect)
+{
+	return (int)round(200.0f * (320.0f / (240.0f * aspect)) * 3.0f);
+}
+
+int AspectPspriteOffset(float aspect)
+{
+	return aspect < 1.3f ? (int)(6.5*FRACUNIT) : 0;
+}
+
+int AspectMultiplier(float aspect)
+{
+	return (int)round(320.0f / (240.0f * aspect) * 48.0f);
+}
+
 void IVideo::DumpAdapters ()
 {
 	Printf("Multi-monitor support unavailable.\n");
diff --git a/src/v_video.h b/src/v_video.h
index 6b46fa2781..2dc3bbddc3 100644
--- a/src/v_video.h
+++ b/src/v_video.h
@@ -518,6 +518,11 @@ int CheckRatio (int width, int height, int *trueratio=NULL);
 static inline int CheckRatio (double width, double height) { return CheckRatio(int(width), int(height)); }
 float ActiveRatio (int width, int height, float *trueratio = NULL);
 static inline double ActiveRatio (double width, double height) { return ActiveRatio(int(width), int(height)); }
+
+int AspectBaseWidth(float aspect);
+int AspectBaseHeight(float aspect);
+int AspectPspriteOffset(float aspect);
+int AspectMultiplier(float aspect);
 extern const int BaseRatioSizes[7][4];
 
 inline bool IsRatioWidescreen(int ratio) {