diff --git a/apps/web/src/App.vue b/apps/web/src/App.vue
index 1c5e362..41710a4 100644
--- a/apps/web/src/App.vue
+++ b/apps/web/src/App.vue
@@ -8,12 +8,11 @@ const auth = useAuthStore();
 const stats = useStatsStore();
 const route = useRoute();
 const crt = ref(false);
+const LOW_HASHRATE_THS = 10;
+const TOP_HASHRATE_THS = 70;
 const heatLevel = computed(() => {
-  const snap = stats.snapshot;
-  if (!snap?.miners.length) return 0;
-  const expected = snap.miners.reduce((sum, m) => sum + m.expectedHashrateThs, 0);
-  if (expected <= 0) return 0;
-  return Math.max(0, Math.min(1, snap.pool.combinedHashrateThs / expected));
+  const total = stats.snapshot?.pool.combinedHashrateThs ?? 0;
+  return Math.max(0, Math.min(1, (total - LOW_HASHRATE_THS) / (TOP_HASHRATE_THS - LOW_HASHRATE_THS)));
 });
 
 onMounted(() => {