diff --git a/impeller/entity/contents/filters/gaussian_blur_filter_contents.cc b/impeller/entity/contents/filters/gaussian_blur_filter_contents.cc
index 838a87c408610..f9f9aa77ca758 100644
--- a/impeller/entity/contents/filters/gaussian_blur_filter_contents.cc
+++ b/impeller/entity/contents/filters/gaussian_blur_filter_contents.cc
@@ -207,7 +207,10 @@ Scalar GaussianBlurFilterContents::CalculateScale(Scalar sigma) {
   if (sigma <= 4) {
     return 1.0;
   }
-  return 4.0 / sigma;
+  Scalar result = 4.0 / sigma;
+  // Round to the nearest 1/(2^n) to get the best quality down scaling.
+  Scalar rounded = pow(2.0f, round(log2(result)));
+  return rounded;
 };
 
 std::optional<Rect> GaussianBlurFilterContents::GetFilterSourceCoverage(
diff --git a/impeller/entity/entity_unittests.cc b/impeller/entity/entity_unittests.cc
index 6841439095d06..042c1baf2d425 100644
--- a/impeller/entity/entity_unittests.cc
+++ b/impeller/entity/entity_unittests.cc
@@ -987,7 +987,8 @@ TEST_P(EntityTest, Filters) {
 }
 
 TEST_P(EntityTest, GaussianBlurFilter) {
-  auto boston = CreateTextureForFixture("boston.jpg");
+  auto boston =
+      CreateTextureForFixture("boston.jpg", /*enable_mipmapping=*/true);
   ASSERT_TRUE(boston);
 
   auto callback = [&](ContentContext& context, RenderPass& pass) -> bool {