diff --git a/widget/image.go b/widget/image.go
index c30941d9..5cc6f6b0 100644
--- a/widget/image.go
+++ b/widget/image.go
@@ -23,18 +23,17 @@ type Image struct {
 	// Position specifies where to position the image within
 	// the constraints.
 	Position layout.Direction
-	// Scale is the ratio of image pixels to
-	// dps. If Scale is zero Image falls back to
-	// a scale that match a standard 72 DPI.
+	// Scale is the factor used for converting image pixels to dp.
+	// If Scale is zero it defaults to 1.
+	//
+	// To map one image pixel to one output pixel, set Scale to 1.0 / gtx.Metric.PxPerDp.
 	Scale float32
 }
 
-const defaultScale = float32(160.0 / 72.0)
-
 func (im Image) Layout(gtx layout.Context) layout.Dimensions {
 	scale := im.Scale
 	if scale == 0 {
-		scale = defaultScale
+		scale = 1
 	}
 
 	size := im.Src.Size()
diff --git a/widget/image_test.go b/widget/image_test.go
index edc183ca..78073ad6 100644
--- a/widget/image_test.go
+++ b/widget/image_test.go
@@ -26,8 +26,8 @@ func TestImageScale(t *testing.T) {
 	// Ensure the default scales correctly.
 	dims := Image{Src: imgOp}.Layout(gtx)
 	expectedSize := imgSize
-	expectedSize.X = int(float32(expectedSize.X) * defaultScale)
-	expectedSize.Y = int(float32(expectedSize.Y) * defaultScale)
+	expectedSize.X = int(float32(expectedSize.X))
+	expectedSize.Y = int(float32(expectedSize.Y))
 	if dims.Size != expectedSize {
 		t.Fatalf("non-scaled image is wrong size, expected %v, got %v", expectedSize, dims.Size)
 	}