diff --git a/src/services/explorer.ts b/src/services/explorer.ts
index eb1c58e..964c4a8 100644
--- a/src/services/explorer.ts
+++ b/src/services/explorer.ts
@@ -25,7 +25,15 @@ export interface ExplorerStats {
 }
 
 export async function getExplorerStats(): Promise<ExplorerStats> {
-  return httpJson<ExplorerStats>(api('/stats'));
+  const raw = await httpJson<ExplorerStats>(api('/stats'));
+  // Blockscout returns `average_block_time` in milliseconds; normalize to seconds
+  // so callers can display `${value.toFixed(1)}s` directly. Chain-138 block time
+  // is ~4s, so a raw value > 60 is a reliable signal that it is still in ms.
+  const average_block_time =
+    typeof raw.average_block_time === 'number' && raw.average_block_time > 60
+      ? raw.average_block_time / 1000
+      : raw.average_block_time;
+  return { ...raw, average_block_time };
 }
 
 export interface ExplorerBlock {