diff --git a/.changelog/15909.txt b/.changelog/15909.txt
new file mode 100644
index 000000000..f0aef43dc
--- /dev/null
+++ b/.changelog/15909.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+ui: Fix allocation memory chart to display the same value as the CLI
+```
diff --git a/ui/app/utils/classes/allocation-stats-tracker.js b/ui/app/utils/classes/allocation-stats-tracker.js
index 869eed000..c8f28f3ac 100644
--- a/ui/app/utils/classes/allocation-stats-tracker.js
+++ b/ui/app/utils/classes/allocation-stats-tracker.js
@@ -29,6 +29,13 @@ const sortMap = [
 const taskPrioritySort = (a, b) =>
   sortMap[a.lifecycleName] - sortMap[b.lifecycleName];
 
+// Select the value for memory usage.
+// Must match logic in command/alloc_status.go.
+const memoryUsed = (frame) =>
+  frame.ResourceUsage.MemoryStats.RSS ||
+  frame.ResourceUsage.MemoryStats.Usage ||
+  0;
+
 @classic
 class AllocationStatsTracker extends EmberObject.extend(AbstractStatsTracker) {
   // Set via the stats computed property macro
@@ -49,15 +56,11 @@ class AllocationStatsTracker extends EmberObject.extend(AbstractStatsTracker) {
       percent: percent(cpuUsed, this.reservedCPU),
     });
 
-    const memoryUsed =
-      frame.ResourceUsage.MemoryStats.Usage ||
-      frame.ResourceUsage.MemoryStats.RSS ||
-      0;
-
+    const memUsed = memoryUsed(frame);
     this.memory.pushObject({
       timestamp,
-      used: memoryUsed,
-      percent: percent(memoryUsed / 1024 / 1024, this.reservedMemory),
+      used: memUsed,
+      percent: percent(memUsed / 1024 / 1024, this.reservedMemory),
     });
 
     let aggregateCpu = 0;
@@ -84,11 +87,7 @@ class AllocationStatsTracker extends EmberObject.extend(AbstractStatsTracker) {
         percentStack: percentCpuTotal + aggregateCpu,
       });
 
-      const taskMemoryUsed =
-        taskFrame.ResourceUsage.MemoryStats.Usage ||
-        taskFrame.ResourceUsage.MemoryStats.RSS ||
-        0;
-
+      const taskMemoryUsed = memoryUsed(taskFrame);
       const percentMemoryTotal = percent(
         taskMemoryUsed / 1024 / 1024,
         this.reservedMemory
diff --git a/ui/tests/unit/utils/allocation-stats-tracker-test.js b/ui/tests/unit/utils/allocation-stats-tracker-test.js
index e4f373108..02cd7c10f 100644
--- a/ui/tests/unit/utils/allocation-stats-tracker-test.js
+++ b/ui/tests/unit/utils/allocation-stats-tracker-test.js
@@ -54,7 +54,7 @@ module('Unit | Util | AllocationStatsTracker', function () {
       },
       MemoryStats: {
         RSS: (step + 400) * 1024 * 1024,
-        Usage: (step + 400) * 1024 * 1024,
+        Usage: (step + 800) * 1024 * 1024,
       },
     },
     Tasks: {
@@ -65,7 +65,7 @@ module('Unit | Util | AllocationStatsTracker', function () {
           },
           MemoryStats: {
             RSS: (step + 100) * 1024 * 1024,
-            Usage: (step + 100) * 1024 * 1024,
+            Usage: (step + 200) * 1024 * 1024,
           },
         },
         Timestamp: refDate + step,
@@ -77,7 +77,7 @@ module('Unit | Util | AllocationStatsTracker', function () {
           },
           MemoryStats: {
             RSS: (step + 50) * 1024 * 1024,
-            Usage: (step + 50) * 1024 * 1024,
+            Usage: (step + 100) * 1024 * 1024,
           },
         },
         Timestamp: refDate + step * 10,
@@ -89,7 +89,7 @@ module('Unit | Util | AllocationStatsTracker', function () {
           },
           MemoryStats: {
             RSS: (step + 51) * 1024 * 1024,
-            Usage: (step + 51) * 1024 * 1024,
+            Usage: (step + 101) * 1024 * 1024,
           },
         },
         Timestamp: refDate + step * 100,