diff --git a/modules/Layout.js b/modules/Layout.js
index 9f3a805be..53447c503 100644
--- a/modules/Layout.js
+++ b/modules/Layout.js
@@ -239,29 +239,37 @@ Layout.prototype.layout = function (l) {
   // exw,exh = extra width/height available
   switch (l.type) {
     case "h": {
-      var x = l.x + (0|l.pad);
+      var acc_w = l.x + (0|l.pad);
+      var accfillx = 0;
       var fillx = l.c && l.c.reduce((a,l)=>a+(0|l.fillx),0);
-      if (!fillx) { x += (l.w-l._w)/2; }
+      if (!fillx) { acc_w += (l.w-l._w)>>1; }
+      var x = acc_w;
       l.c.forEach(c => {
-        c.w = c._w + ((0|c.fillx)*(l.w-l._w)/(fillx||1));
-        c.h = c.filly ? l.h - (l.pad<<1) : c._h;
-        c.x = x;
-        c.y = l.y + (0|l.pad) + (1+(0|c.valign))*(l.h-(l.pad<<1)-c.h)/2;
-        x += c.w;
+        c.x = 0|x;
+        acc_w += c._w;
+        accfillx += 0|c.fillx;
+        x = acc_w + Math.floor(accfillx*(l.w-l._w)/(fillx||1));
+        c.w = 0|(x - c.x);
+        c.h = 0|(c.filly ? l.h - (l.pad<<1) : c._h);
+        c.y = 0|(l.y + (0|l.pad) + ((1+(0|c.valign))*(l.h-(l.pad<<1)-c.h)>>1));
         if (c.c) this.layout(c);
       });
       break;
     }
     case "v": {
-      var y = l.y + (0|l.pad);;
+      var acc_h = l.y + (0|l.pad);
+      var accfilly = 0;
       var filly = l.c && l.c.reduce((a,l)=>a+(0|l.filly),0);
-      if (!filly) { y += (l.h-l._h)/2 }
+      if (!filly) { acc_h += (l.h-l._h)>>1; }
+      var y = acc_h;
       l.c.forEach(c => {
-        c.w = c.fillx ? l.w - (l.pad<<1) : c._w;
-        c.h = c._h + ((0|c.filly)*(l.h-l._h)/(filly||1));
-        c.y = y;
-        c.x = l.x + (0|l.pad) + (1+(0|c.halign))*(l.w-(l.pad<<1)-c.w)/2;
-        y += c.h;
+        c.y = 0|y;
+        acc_h += c._h;
+        accfilly += 0|c.filly;
+        y = acc_h + Math.floor(accfilly*(l.h-l._h)/(filly||1));
+        c.h = 0|(y - c.y);
+        c.w = 0|(c.fillx ? l.w - (l.pad<<1) : c._w);
+        c.x = 0|(l.x + (0|l.pad) + ((1+(0|c.halign))*(l.w-(l.pad<<1)-c.w)>>1));
         if (c.c) this.layout(c);
       });
       break;
@@ -288,8 +296,8 @@ Layout.prototype.update = function() {
     if (l.r&1) { // rotation
       var t = l._w;l._w=l._h;l._h=t;
     }
-    l._w = Math.max(l._w + (l.pad<<1), 0|l.width);
-    l._h = Math.max(l._h + (l.pad<<1), 0|l.height);
+    l._w = 0|Math.max(l._w + (l.pad<<1), 0|l.width);
+    l._h = 0|Math.max(l._h + (l.pad<<1), 0|l.height);
   }
   var cb = {
     "txt" : function(l) {
@@ -349,8 +357,8 @@ Layout.prototype.update = function() {
   } else {
     l.w = l._w;
     l.h = l._h;
-    l.x = (w-l.w)/2;
-    l.y = y+(h-l.h)/2;
+    l.x = (w-l.w)>>1;
+    l.y = y+((h-l.h)>>1);
   }
   // layout children
   this.layout(l);
diff --git a/tests/Layout/tests/filly_issue820.bmp b/tests/Layout/tests/filly_issue820.bmp
index 886ba97d8..adfe9164e 100644
Binary files a/tests/Layout/tests/filly_issue820.bmp and b/tests/Layout/tests/filly_issue820.bmp differ
diff --git a/tests/Layout/tests/padding_with_fill.bmp b/tests/Layout/tests/padding_with_fill.bmp
index 15e05b0d9..2c785bbc0 100644
Binary files a/tests/Layout/tests/padding_with_fill.bmp and b/tests/Layout/tests/padding_with_fill.bmp differ