diff --git a/src/com/android/settings/fuelgauge/BatteryUtils.java b/src/com/android/settings/fuelgauge/BatteryUtils.java
index 4abc1b192ed..b5f94fc8219 100644
--- a/src/com/android/settings/fuelgauge/BatteryUtils.java
+++ b/src/com/android/settings/fuelgauge/BatteryUtils.java
@@ -330,7 +330,8 @@ public class BatteryUtils {
     long getForegroundActivityTotalTimeMs(BatteryStats.Uid uid, long rawRealtimeMs) {
         final BatteryStats.Timer timer = uid.getForegroundActivityTimer();
         if (timer != null) {
-            return timer.getTotalTimeLocked(rawRealtimeMs, BatteryStats.STATS_SINCE_CHARGED);
+            return convertUsToMs(
+                    timer.getTotalTimeLocked(rawRealtimeMs, BatteryStats.STATS_SINCE_CHARGED));
         }
 
         return 0;
diff --git a/tests/robotests/src/com/android/settings/fuelgauge/BatteryUtilsTest.java b/tests/robotests/src/com/android/settings/fuelgauge/BatteryUtilsTest.java
index 8dbb3be1c67..29c74da8b67 100644
--- a/tests/robotests/src/com/android/settings/fuelgauge/BatteryUtilsTest.java
+++ b/tests/robotests/src/com/android/settings/fuelgauge/BatteryUtilsTest.java
@@ -95,6 +95,8 @@ public class BatteryUtilsTest {
     @Mock
     private BatteryStats.Uid mUid;
     @Mock
+    private BatteryStats.Timer mTimer;
+    @Mock
     private BatterySipper mNormalBatterySipper;
     @Mock
     private BatterySipper mWifiBatterySipper;
@@ -358,6 +360,16 @@ public class BatteryUtilsTest {
                 .isEqualTo(R.string.battery_abnormal_location_summary);
     }
 
+    @Test
+    public void testGetForegroundActivityTotalTimeMs_returnMilliseconds() {
+        doReturn(mTimer).when(mUid).getForegroundActivityTimer();
+        doReturn(TIME_SINCE_LAST_FULL_CHARGE_US).when(mTimer).getTotalTimeLocked(anyLong(),
+                anyInt());
+
+        assertThat(mBatteryUtils.getForegroundActivityTotalTimeMs(mUid, 0)).isEqualTo(
+                TIME_SINCE_LAST_FULL_CHARGE_MS);
+    }
+
     private BatterySipper createTestSmearBatterySipper(long activityTime, long topTime,
             double totalPowerMah, int uidCode, boolean isUidNull) {
         final BatterySipper sipper = mock(BatterySipper.class);