diff --git a/src/main/java/org/dynmap/Armor.java b/src/main/java/org/dynmap/Armor.java
index 9632e846..83265bef 100644
--- a/src/main/java/org/dynmap/Armor.java
+++ b/src/main/java/org/dynmap/Armor.java
@@ -2,6 +2,7 @@ package org.dynmap;
 
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.PlayerInventory;
 import org.bukkit.Material;
 
 public class Armor {
@@ -10,27 +11,34 @@ public class Armor {
      * We rely on getArmorContents() to return 4 armor pieces in the order
      * of: boots, pants, chest, helmet
      */
-    private static final double armorPoints[] = {1.5, 3.0, 4.0, 1.5};
+    private static final int armorPoints[] = {3, 6, 8, 3};
 
     public static final int getArmorPoints(Player player) {
         int currentDurability = 0;
         int baseDurability = 0;
-        double baseArmorPoints = 0;
-        ItemStack inventory[] = player.getInventory().getArmorContents();
-        for(int i=0;i<inventory.length;i++) {
-            if(inventory[i] == null)
-                continue;
-            Material m = inventory[i].getType();
-            if(m == null)
-                continue;
-            final short maxDurability = m.getMaxDurability();
-            if(maxDurability < 0)
-                continue;
-            final short durability = inventory[i].getDurability();
-            baseDurability += maxDurability;
-            currentDurability += maxDurability - durability;
-            baseArmorPoints += armorPoints[i];
+        int baseArmorPoints = 0;
+        ItemStack[] itm = new ItemStack[4];
+        PlayerInventory inv = player.getInventory();
+        itm[0] = inv.getBoots();
+        itm[1]= inv.getLeggings();
+        itm[2] = inv.getChestplate();
+        itm[3] = inv.getHelmet();
+        for(int i = 0; i < 4; i++) {
+    		if(itm[i] == null) continue;
+        	int dur = itm[i].getDurability();
+        	int max = itm[i].getType().getMaxDurability();
+        	if(max <= 0) continue;
+        	if(i == 2)
+    			max = max + 1;	/* Always 1 too low for chestplate */
+        	else
+        		max = max - 3;	/* Always 3 too high, versus how client calculates it */
+        	baseDurability += max;
+        	currentDurability += max - dur;
+        	baseArmorPoints += armorPoints[i];
         }
-        return (int)Math.round(2*baseArmorPoints*currentDurability/baseDurability);
+        int ap = 0;
+        if(baseDurability > 0)
+    		ap = ((baseArmorPoints - 1) * currentDurability) / baseDurability + 1;
+        return ap;
     }
 }