diff --git a/internal/ui/format.go b/internal/ui/format.go
index dc0166089..13d02f9e3 100644
--- a/internal/ui/format.go
+++ b/internal/ui/format.go
@@ -8,13 +8,13 @@ import (
 func FormatBytes(c uint64) string {
 	b := float64(c)
 	switch {
-	case c > 1<<40:
+	case c >= 1<<40:
 		return fmt.Sprintf("%.3f TiB", b/(1<<40))
-	case c > 1<<30:
+	case c >= 1<<30:
 		return fmt.Sprintf("%.3f GiB", b/(1<<30))
-	case c > 1<<20:
+	case c >= 1<<20:
 		return fmt.Sprintf("%.3f MiB", b/(1<<20))
-	case c > 1<<10:
+	case c >= 1<<10:
 		return fmt.Sprintf("%.3f KiB", b/(1<<10))
 	default:
 		return fmt.Sprintf("%d B", c)
diff --git a/internal/ui/format_test.go b/internal/ui/format_test.go
index 3be08d496..b6a1c13d1 100644
--- a/internal/ui/format_test.go
+++ b/internal/ui/format_test.go
@@ -8,8 +8,13 @@ func TestFormatBytes(t *testing.T) {
 		want string
 	}{
 		{0, "0 B"},
-		{1025, "1.001 KiB"},
-		{1<<30 + 7, "1.000 GiB"},
+		{1023, "1023 B"},
+		{1024, "1.000 KiB"},
+		{5<<20 + 1<<19, "5.500 MiB"},
+		{1 << 30, "1.000 GiB"},
+		{2 << 30, "2.000 GiB"},
+		{1<<40 - 1<<36, "960.000 GiB"},
+		{1 << 40, "1.000 TiB"},
 	} {
 		if got := FormatBytes(c.size); got != c.want {
 			t.Errorf("want %q, got %q", c.want, got)