diff --git a/ecs_container_exporter/main.py b/ecs_container_exporter/main.py
index 8fa3fc9..bbc565c 100755
--- a/ecs_container_exporter/main.py
+++ b/ecs_container_exporter/main.py
@@ -178,12 +178,17 @@ def should_process_container(self, container_name, include_containers, exclude_c
                 return True
 
     def cpu_mem_limit(self, metadata):
-        # normalise to `cpu shares`
-        cpu_limit = metadata.get('Limits', {}).get('CPU', 0) * 1024
+        cpu_limit = metadata.get('Limits', {}).get('CPU', 0)
+
+        # Can be CPU shares or CPU units
+        # normalize to `CPU shares` since 256 is min share
+        scale_factor = 1024 if cpu_limit < 256 else 1
+
         mem_limit = metadata.get('Limits', {}).get('Memory', 0)
 
         return (
-            cpu_limit, mem_limit
+            cpu_limit * scale_factor,
+            mem_limit
         )
 
     # All metrics are collected here