diff --git a/libraries/common/src/main/java/androidx/media3/common/util/SpeedProviderUtil.java b/libraries/common/src/main/java/androidx/media3/common/util/SpeedProviderUtil.java
index 8a7bb0432a..ac6ea31233 100644
--- a/libraries/common/src/main/java/androidx/media3/common/util/SpeedProviderUtil.java
+++ b/libraries/common/src/main/java/androidx/media3/common/util/SpeedProviderUtil.java
@@ -15,8 +15,8 @@
  */
 package androidx.media3.common.util;
 
+import static java.lang.Math.floor;
 import static java.lang.Math.min;
-import static java.lang.Math.round;
 
 import androidx.media3.common.C;
 import androidx.media3.common.audio.SpeedProvider;
@@ -45,6 +45,7 @@ public class SpeedProviderUtil {
               / (double) speedProvider.getSpeed(speedChangeTimeUs);
       speedChangeTimeUs = nextSpeedChangeTimeUs;
     }
-    return round(outputDurationUs);
+    // Use floor to be consistent with Util#scaleLargeTimestamp().
+    return (long) floor(outputDurationUs);
   }
 }
diff --git a/libraries/common/src/test/java/androidx/media3/common/util/SpeedProviderUtilTest.java b/libraries/common/src/test/java/androidx/media3/common/util/SpeedProviderUtilTest.java
index 8368348f56..749b4f87c7 100644
--- a/libraries/common/src/test/java/androidx/media3/common/util/SpeedProviderUtilTest.java
+++ b/libraries/common/src/test/java/androidx/media3/common/util/SpeedProviderUtilTest.java
@@ -46,6 +46,6 @@ public class SpeedProviderUtilTest {
             /* startTimesUs= */ new long[] {0, 113}, /* speeds= */ new float[] {2, 1});
 
     assertThat(getDurationAfterSpeedProviderApplied(speedProvider, /* durationUs= */ 113))
-        .isEqualTo(57);
+        .isEqualTo(56);
   }
 }
diff --git a/libraries/test_utils/src/main/java/androidx/media3/test/utils/TestSpeedProvider.java b/libraries/test_utils/src/main/java/androidx/media3/test/utils/TestSpeedProvider.java
index d505235c3a..9b7be297f1 100644
--- a/libraries/test_utils/src/main/java/androidx/media3/test/utils/TestSpeedProvider.java
+++ b/libraries/test_utils/src/main/java/androidx/media3/test/utils/TestSpeedProvider.java
@@ -16,6 +16,7 @@
 package androidx.media3.test.utils;
 
 import static androidx.media3.common.util.Assertions.checkArgument;
+import static androidx.media3.common.util.Util.sampleCountToDurationUs;
 
 import androidx.media3.common.C;
 import androidx.media3.common.audio.AudioProcessor.AudioFormat;
@@ -56,7 +57,7 @@ public final class TestSpeedProvider implements SpeedProvider {
     long[] startTimesUs = new long[frameCounts.length];
     int totalFrameCount = 0;
     for (int i = 0; i < frameCounts.length; i++) {
-      startTimesUs[i] = totalFrameCount * C.MICROS_PER_SECOND / audioFormat.sampleRate;
+      startTimesUs[i] = sampleCountToDurationUs(totalFrameCount, audioFormat.sampleRate);
       totalFrameCount += frameCounts[i];
     }
     return new TestSpeedProvider(startTimesUs, speeds);