diff --git a/zelda-botw/_cache_service_worker.js b/zelda-botw/_cache_service_worker.js
index 36c653e..98ad11b 100644
--- a/zelda-botw/_cache_service_worker.js
+++ b/zelda-botw/_cache_service_worker.js
@@ -30,7 +30,7 @@ caches.keys().then(function(cacheNames){
 });
 
 var PRECACHE_ID='zelda-botw-editor';
-var PRECACHE_VERSION='v5c';
+var PRECACHE_VERSION='v6';
 var PRECACHE_URLS=[
 	//is hashes file too big for cacheing?
 	'/savegame-editors/zelda-botw/','/savegame-editors/zelda-botw/index.html',
@@ -39,6 +39,7 @@ var PRECACHE_URLS=[
 	'/savegame-editors/zelda-botw/zelda-botw.data.js',
 	'/savegame-editors/zelda-botw/zelda-botw.icons.js',
 	'/savegame-editors/zelda-botw/zelda-botw.locations.js',
+	'/savegame-editors/zelda-botw/zelda-botw.score.js',
 	'/savegame-editors/zelda-botw/zelda-botw.master.js',
 	'/savegame-editors/zelda-botw/favicon.png',
 	'/savegame-editors/zelda-botw/assets/_blank.png',
diff --git a/zelda-botw/index.html b/zelda-botw/index.html
index c249052..713c43d 100644
--- a/zelda-botw/index.html
+++ b/zelda-botw/index.html
@@ -14,6 +14,7 @@
 	<script type="text/javascript" src="./zelda-botw.locations.js"></script>
 	<script type="text/javascript" src="./zelda-botw.icons.js"></script>
 	<script type="text/javascript" src="./zelda-botw.master.js"></script>
+	<script type="text/javascript" src="./zelda-botw.score.js"></script>
 	<script type="text/javascript"><!--
 		/* service worker */
 		var FORCE_HTTPS=true;
@@ -154,6 +155,13 @@
 				</select>
 			</div>
 		</div>
+		<div class="row" style="margin-top:10px">
+			<div class="ten columns">Scale score</div>
+			<div class="two columns text-right">
+				<span id="span-scale-score"></span>
+				<a target="_blank" href="https://www.reddit.com/r/Breath_of_the_Wild/comments/8fchiq/about_difficulty_scaling_for_enemies_and_weapons/" class="external-link-help help">?</a>
+			</div>
+		</div>
 		
 		<!-- Coordinates (Requires a memory editor) -->
 		<h3 class="border-green">Coordinates</h3>
diff --git a/zelda-botw/zelda-botw.css b/zelda-botw/zelda-botw.css
index cc7db39..e135989 100644
--- a/zelda-botw/zelda-botw.css
+++ b/zelda-botw/zelda-botw.css
@@ -1,4 +1,4 @@
-/* Zelda BOTW Savegame editor by Marc Robledo v20200215 */
+/* Zelda BOTW Savegame editor by Marc Robledo v20230902 */
 /* minify at https://cssminifier.com/ + https://www.base64-image.de/ (sprites */
 
 /* @FONT-FACES */
@@ -476,6 +476,22 @@ button.no-text.with-icon:before{margin-right:0px}
 }
 
 
+.external-link-help{
+	background-color:#f9f5da;
+	color:black;
+	padding: 0px 8px;
+	font-size:80%;
+	font-weight:bold;
+	border-radius:3px;
+	text-decoration:none;
+}
+.external-link-help:hover{
+	background-color:white;
+}
+
+
+
+
 
 /* MarcDragAndDrop */
 #dragzone{
diff --git a/zelda-botw/zelda-botw.js b/zelda-botw/zelda-botw.js
index bf036da..5e39055 100644
--- a/zelda-botw/zelda-botw.js
+++ b/zelda-botw/zelda-botw.js
@@ -1,5 +1,5 @@
 /*
-	The legend of Zelda: Breath of the wild v20200218
+	The legend of Zelda: Breath of the wild v20230902
 	by Marc Robledo 2017-2020
 */
 var currentEditingItem=0;
@@ -7,7 +7,7 @@ var currentEditingItem=0;
 SavegameEditor={
 	Name:'The legend of Zelda: Breath of the wild',
 	Filename:'game_data.sav',
-	Version:20200218,
+	Version:20230902,
 
 	/* Constants */
 	Constants:{
@@ -617,11 +617,10 @@ SavegameEditor={
 		}
 
 
-
-
-
-
 		showTab('home');
+
+		/* scale score */
+		setValue('scale-score', BOTWScoreCalculator.calculate());
 	},
 
 	/* save function */
@@ -1038,12 +1037,12 @@ function onScroll(){
 }
 window.addEventListener('scroll', onScroll, false);
 
-if(typeof String.endsWith==='undefined'){
+if(typeof String.prototype.endsWith==='undefined'){
 	String.prototype.endsWith=function(search){
         return (new RegExp(search+'$')).test(this)
     };
 }
-if(typeof String.startsWith==='undefined'){
+if(typeof String.prototype.startsWith==='undefined'){
 	String.prototype.startsWith=function(search){
         return (new RegExp('^'+search)).test(this)
     };
diff --git a/zelda-botw/zelda-botw.score.js b/zelda-botw/zelda-botw.score.js
new file mode 100644
index 0000000..f4f69c7
--- /dev/null
+++ b/zelda-botw/zelda-botw.score.js
@@ -0,0 +1,121 @@
+/*
+	The legend of Zelda: Breath of the wild Savegame Editor (Experience/score calculation) v20230708
+
+	by cutecryptid 2019
+
+	based on https://www.reddit.com/r/Breath_of_the_Wild/comments/8fchiq/about_difficulty_scaling_for_enemies_and_weapons/
+*/
+
+
+var BOTWScoreCalculator=(function(){
+	const ENEMY_POINTS={
+		Defeated_Enemy_Wizzrobe_Electric_Num: 5.0,
+		Defeated_Enemy_Wizzrobe_Fire_Num: 5.0,
+		Defeated_Enemy_Wizzrobe_Ice_Num: 5.0,
+		Defeated_Enemy_Guardian_A_Fixed_Moss_Num: 12.0,
+		Defeated_Enemy_Golem_Junior_Num: 15.0,
+		Defeated_Enemy_Giant_Junior_Num: 15.0,
+		Defeated_Enemy_Assassin_Middle_Num: 15.0,
+		Defeated_Enemy_Bokoblin_Senior_Num: 15.0,
+		Defeated_Enemy_Wizzrobe_Ice_Senior_Num: 15.0,
+		Defeated_Enemy_Wizzrobe_Fire_Senior_Num: 15.0,
+		Defeated_Enemy_Wizzrobe_Electric_Senior_Num: 15.0,
+		Defeated_RemainsFire_Drone_A_01_Num: 15.0,
+		Defeated_Enemy_Moriblin_Senior_Num: 18.0,
+		Defeated_Enemy_Guardian_Mini_Middle_Num: 20.0,
+		Defeated_Enemy_Lizalfos_Electric_Num: 20.0,
+		Defeated_Enemy_Lizalfos_Ice_Num: 20.0,
+		Defeated_Enemy_Lizalfos_Senior_Num: 20.0,
+		Defeated_Enemy_Lizalfos_Fire_Num: 20.0,
+		Defeated_Enemy_Bokoblin_Gold_Num: 25.0,
+		Defeated_Enemy_Giant_Bone_Num: 25.0,
+		Defeated_Enemy_Bokoblin_Dark_Num: 25.0,
+		Defeated_Enemy_Golem_Middle_Num: 25.0,
+		Defeated_Enemy_Giant_Middle_Num: 25.0,
+		Defeated_Enemy_Golem_Senior_Num: 30.0,
+		Defeated_Enemy_Golem_Fire_Num: 35.0,
+		Defeated_Enemy_Moriblin_Gold_Num: 35.0,
+		Defeated_Enemy_Guardian_Mini_Senior_Num: 35.0,
+		Defeated_Enemy_Guardian_B_Num: 35.0,
+		Defeated_Enemy_Golem_Ice_Num: 35.0,
+		Defeated_Enemy_Moriblin_Dark_Num: 35.0,
+		Defeated_Enemy_Golem_Fire_R_Num: 35.0,
+		Defeated_Enemy_Giant_Senior_Num: 35.0,
+		Defeated_Enemy_Lizalfos_Dark_Num: 40.0,
+		Defeated_Enemy_Lizalfos_Gold_Num: 40.0,
+		Defeated_Enemy_SandwormR_Num: 50.0,
+		Defeated_Enemy_Guardian_A_Num: 50.0,
+		Defeated_Enemy_Guardian_C_Num: 50.0,
+		Defeated_Enemy_Sandworm_Num: 50.0,
+		Defeated_Enemy_Lynel_Junior_Num: 50.0,
+		Defeated_Enemy_Lynel_Middle_Num: 60.0,
+		Defeated_Enemy_Lynel_Senior_Num: 80.0,
+		Defeated_Enemy_Assassin_Senior_Num: 100.0,
+		Defeated_Enemy_Lynel_Gold_Num: 120.0,
+		Defeated_Enemy_Lynel_Dark_Num: 120.0,
+		Defeated_Enemy_SiteBoss_Lsword_Num: 300.0,
+		Defeated_Enemy_SiteBoss_Spear_Num: 300.0,
+		Defeated_Enemy_SiteBoss_Sword_Num: 300.0,
+		Defeated_Enemy_SiteBoss_Bow_Num: 300.0,
+		Defeated_Priest_Boss_Normal_Num: 500.0,
+		Defeated_Enemy_GanonBeast_Num: 800.0
+	};
+
+
+
+	/* crc32 from https://stackoverflow.com/a/18639999 */
+	const CRC32_TABLE=(function(){
+		var c;
+		var crcTable = [];
+		for(var n =0; n < 256; n++){
+			c = n;
+			for(var k =0; k < 8; k++){
+				c = ((c&1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
+			}
+			crcTable[n] = c;
+		}
+		return crcTable;
+	}());
+
+	var crc32=function(str){
+		var crc = 0 ^ (-1);
+
+		for (var i = 0; i < str.length; i++ ) {
+			crc = (crc >>> 8) ^ CRC32_TABLE[(crc ^ str.charCodeAt(i)) & 0xFF];
+		}
+
+		return (crc ^ (-1)) >>> 0;
+	};
+
+
+	var findHashesIn;
+
+	return {
+		calculate:function(){
+			if(!findHashesIn){
+				findHashesIn=[];
+				Object.keys(ENEMY_POINTS).forEach(function(hashId){
+					findHashesIn[crc32(hashId)]=ENEMY_POINTS[hashId];
+				});
+			}
+
+			var scaleScore = 0
+			var previousHashValue=0;
+			for(var i=0x0c; i<tempFile.fileSize-4; i+=8){
+				var hashValue=tempFile.readU32(i);
+
+				if(hashValue===previousHashValue)
+					continue;
+				previousHashValue=hashValue;
+
+				if(findHashesIn[hashValue]){
+					defeated = tempFile.readU32(i+4);
+					enepoints = findHashesIn[hashValue];
+					scaleScore += enepoints*defeated;
+				}
+			}
+
+			return scaleScore;
+		}
+	}
+}());
\ No newline at end of file