diff --git a/webrtc/common_audio/lapped_transform.h b/webrtc/common_audio/lapped_transform.h
index 9f6b302832..d299bceb71 100644
--- a/webrtc/common_audio/lapped_transform.h
+++ b/webrtc/common_audio/lapped_transform.h
@@ -57,6 +57,14 @@ class LappedTransform {
   // |out_chunk|. Both buffers are caller-owned.
   void ProcessChunk(const float* const* in_chunk, float* const* out_chunk);
 
+  // Get the chunk length.
+  //
+  // The chunk length is the number of samples per channel that must be passed
+  // to ProcessChunk via the parameter in_chunk.
+  //
+  // Returns the same chunk_length passed to the LappedTransform constructor.
+  int get_chunk_length() const { return chunk_length_; }
+
  private:
   // Internal middleware callback, given to the blocker. Transforms each block
   // and hands it over to the processing method given at construction time.
diff --git a/webrtc/common_audio/lapped_transform_unittest.cc b/webrtc/common_audio/lapped_transform_unittest.cc
index 1bfb3b4b65..ac24a0dd41 100644
--- a/webrtc/common_audio/lapped_transform_unittest.cc
+++ b/webrtc/common_audio/lapped_transform_unittest.cc
@@ -177,5 +177,27 @@ TEST(LappedTransformTest, Callbacks) {
   ASSERT_EQ(kChunkLength / kBlockLength, call.block_num());
 }
 
-}  // namespace webrtc
+TEST(LappedTransformTest, get_chunk_length) {
+  const int kBlockLength = 64;
+  FftCheckerCallback call;
+  const float window[kBlockLength] = {};
 
+  // Make sure that get_chunk_length returns the same value passed to the
+  // LappedTransform constructor.
+  {
+    const int kExpectedChunkLength = 512;
+    const LappedTransform trans(1, 1, kExpectedChunkLength, window,
+                                kBlockLength, kBlockLength, &call);
+
+    EXPECT_EQ(kExpectedChunkLength, trans.get_chunk_length());
+  }
+  {
+    const int kExpectedChunkLength = 160;
+    const LappedTransform trans(1, 1, kExpectedChunkLength, window,
+                                kBlockLength, kBlockLength, &call);
+
+    EXPECT_EQ(kExpectedChunkLength, trans.get_chunk_length());
+  }
+}
+
+}  // namespace webrtc