diff --git a/feature/converter/src/main/java/com/sadellie/unitto/feature/converter/components/TopScreen.kt b/feature/converter/src/main/java/com/sadellie/unitto/feature/converter/components/TopScreen.kt
index f73a2bd5..31507ee5 100644
--- a/feature/converter/src/main/java/com/sadellie/unitto/feature/converter/components/TopScreen.kt
+++ b/feature/converter/src/main/java/com/sadellie/unitto/feature/converter/components/TopScreen.kt
@@ -301,7 +301,7 @@ internal fun TopScreenPart(
                     navigateToRightScreen(
                         unitFrom.unitId,
                         unitTo.unitId,
-                        input
+                        input?.ifEmpty { "0" }
                     )
                 },
                 label = unitTo?.displayName ?: R.string.loading_label,