--- a/www/js/global.js	Sun May 26 16:09:50 2019 +0200
+++ b/www/js/global.js	Sun May 26 20:37:28 2019 +0200
@@ -1058,3 +1058,16 @@
 	return f2d + 2*f3d + 3*f4d;
 }
 
+
+function lintner_to_kolbach(lintner) {
+
+	return (3.5 * lintner) - 16;
+}
+
+
+function kolbach_to_lintner(kolbach) {
+
+	return (kolbach + 16) / 3.5;
+}
+
+