diff --git a/Sources/Interaction/UI/FPSMonitor/index.js b/Sources/Interaction/UI/FPSMonitor/index.js
index a2ed9c04ccd..c696218a508 100644
--- a/Sources/Interaction/UI/FPSMonitor/index.js
+++ b/Sources/Interaction/UI/FPSMonitor/index.js
@@ -7,9 +7,13 @@ function formatNumbers(n) {
   const sections = [];
   let size = n;
   while (size > 1000) {
-    sections.push(`000${size % 1000}`.slice(-3));
+    sections.push(`000${Math.floor(size) % 1000}`.slice(-3));
     size = Math.floor(size / 1000);
   }
+  if (size % 1 !== 0) {
+    // float
+    size = size.toFixed(6);
+  }
   if (size > 0) {
     sections.push(size);
   }