diff --git a/cmd/server/config.go b/cmd/server/config.go
index d8afe52a..ff2ee36d 100644
--- a/cmd/server/config.go
+++ b/cmd/server/config.go
@@ -60,10 +60,10 @@ func (c *Config) NodeDaysOrDefault() int {
 }
 
 type HealthThresholds struct {
-	InfraDegradedMs int `json:"infraDegradedMs"`
-	InfraSilentMs   int `json:"infraSilentMs"`
-	NodeDegradedMs  int `json:"nodeDegradedMs"`
-	NodeSilentMs    int `json:"nodeSilentMs"`
+	InfraDegradedHours float64 `json:"infraDegradedHours"`
+	InfraSilentHours   float64 `json:"infraSilentHours"`
+	NodeDegradedHours  float64 `json:"nodeDegradedHours"`
+	NodeSilentHours    float64 `json:"nodeSilentHours"`
 }
 
 // ThemeFile mirrors theme.json overlay.
@@ -126,34 +126,46 @@ func LoadTheme(baseDirs ...string) *ThemeFile {
 
 func (c *Config) GetHealthThresholds() HealthThresholds {
 	h := HealthThresholds{
-		InfraDegradedMs: 86400000,
-		InfraSilentMs:   259200000,
-		NodeDegradedMs:  3600000,
-		NodeSilentMs:    86400000,
+		InfraDegradedHours: 24,
+		InfraSilentHours:   72,
+		NodeDegradedHours:  1,
+		NodeSilentHours:    24,
 	}
 	if c.HealthThresholds != nil {
-		if c.HealthThresholds.InfraDegradedMs > 0 {
-			h.InfraDegradedMs = c.HealthThresholds.InfraDegradedMs
+		if c.HealthThresholds.InfraDegradedHours > 0 {
+			h.InfraDegradedHours = c.HealthThresholds.InfraDegradedHours
 		}
-		if c.HealthThresholds.InfraSilentMs > 0 {
-			h.InfraSilentMs = c.HealthThresholds.InfraSilentMs
+		if c.HealthThresholds.InfraSilentHours > 0 {
+			h.InfraSilentHours = c.HealthThresholds.InfraSilentHours
 		}
-		if c.HealthThresholds.NodeDegradedMs > 0 {
-			h.NodeDegradedMs = c.HealthThresholds.NodeDegradedMs
+		if c.HealthThresholds.NodeDegradedHours > 0 {
+			h.NodeDegradedHours = c.HealthThresholds.NodeDegradedHours
 		}
-		if c.HealthThresholds.NodeSilentMs > 0 {
-			h.NodeSilentMs = c.HealthThresholds.NodeSilentMs
+		if c.HealthThresholds.NodeSilentHours > 0 {
+			h.NodeSilentHours = c.HealthThresholds.NodeSilentHours
 		}
 	}
 	return h
 }
 
-// GetHealthMs returns degraded/silent thresholds for a given role.
+// GetHealthMs returns degraded/silent thresholds in ms for a given role.
 func (h HealthThresholds) GetHealthMs(role string) (degradedMs, silentMs int) {
+	const hourMs = 3600000
 	if role == "repeater" || role == "room" {
-		return h.InfraDegradedMs, h.InfraSilentMs
+		return int(h.InfraDegradedHours * hourMs), int(h.InfraSilentHours * hourMs)
+	}
+	return int(h.NodeDegradedHours * hourMs), int(h.NodeSilentHours * hourMs)
+}
+
+// ToClientMs returns the thresholds as ms for the frontend.
+func (h HealthThresholds) ToClientMs() map[string]int {
+	const hourMs = 3600000
+	return map[string]int{
+		"infraDegradedMs": int(h.InfraDegradedHours * hourMs),
+		"infraSilentMs":   int(h.InfraSilentHours * hourMs),
+		"nodeDegradedMs":  int(h.NodeDegradedHours * hourMs),
+		"nodeSilentMs":    int(h.NodeSilentHours * hourMs),
 	}
-	return h.NodeDegradedMs, h.NodeSilentMs
 }
 
 func (c *Config) ResolveDBPath(baseDir string) string {
diff --git a/cmd/server/config_test.go b/cmd/server/config_test.go
index 2a6f5cfc..4252685d 100644
--- a/cmd/server/config_test.go
+++ b/cmd/server/config_test.go
@@ -23,10 +23,10 @@ func TestLoadConfigValidJSON(t *testing.T) {
 			"SJC": "San Jose",
 		},
 		"healthThresholds": map[string]interface{}{
-			"infraDegradedMs": 100000,
-			"infraSilentMs":   200000,
-			"nodeDegradedMs":  50000,
-			"nodeSilentMs":    100000,
+			"infraDegradedHours": 2,
+			"infraSilentHours":   4,
+			"nodeDegradedHours":  0.5,
+			"nodeSilentHours":    2,
 		},
 		"liveMap": map[string]interface{}{
 			"propagationBufferMs": 3000,
@@ -178,68 +178,68 @@ func TestGetHealthThresholdsDefaults(t *testing.T) {
 	cfg := &Config{}
 	ht := cfg.GetHealthThresholds()
 
-	if ht.InfraDegradedMs != 86400000 {
-		t.Errorf("expected 86400000, got %d", ht.InfraDegradedMs)
+	if ht.InfraDegradedHours != 24 {
+		t.Errorf("expected 24, got %v", ht.InfraDegradedHours)
 	}
-	if ht.InfraSilentMs != 259200000 {
-		t.Errorf("expected 259200000, got %d", ht.InfraSilentMs)
+	if ht.InfraSilentHours != 72 {
+		t.Errorf("expected 72, got %v", ht.InfraSilentHours)
 	}
-	if ht.NodeDegradedMs != 3600000 {
-		t.Errorf("expected 3600000, got %d", ht.NodeDegradedMs)
+	if ht.NodeDegradedHours != 1 {
+		t.Errorf("expected 1, got %v", ht.NodeDegradedHours)
 	}
-	if ht.NodeSilentMs != 86400000 {
-		t.Errorf("expected 86400000, got %d", ht.NodeSilentMs)
+	if ht.NodeSilentHours != 24 {
+		t.Errorf("expected 24, got %v", ht.NodeSilentHours)
 	}
 }
 
 func TestGetHealthThresholdsCustom(t *testing.T) {
 	cfg := &Config{
 		HealthThresholds: &HealthThresholds{
-			InfraDegradedMs: 100000,
-			InfraSilentMs:   200000,
-			NodeDegradedMs:  50000,
-			NodeSilentMs:    100000,
+			InfraDegradedHours: 2,
+			InfraSilentHours:   4,
+			NodeDegradedHours:  0.5,
+			NodeSilentHours:    2,
 		},
 	}
 	ht := cfg.GetHealthThresholds()
 
-	if ht.InfraDegradedMs != 100000 {
-		t.Errorf("expected 100000, got %d", ht.InfraDegradedMs)
+	if ht.InfraDegradedHours != 2 {
+		t.Errorf("expected 2, got %v", ht.InfraDegradedHours)
 	}
-	if ht.InfraSilentMs != 200000 {
-		t.Errorf("expected 200000, got %d", ht.InfraSilentMs)
+	if ht.InfraSilentHours != 4 {
+		t.Errorf("expected 4, got %v", ht.InfraSilentHours)
 	}
-	if ht.NodeDegradedMs != 50000 {
-		t.Errorf("expected 50000, got %d", ht.NodeDegradedMs)
+	if ht.NodeDegradedHours != 0.5 {
+		t.Errorf("expected 0.5, got %v", ht.NodeDegradedHours)
 	}
-	if ht.NodeSilentMs != 100000 {
-		t.Errorf("expected 100000, got %d", ht.NodeSilentMs)
+	if ht.NodeSilentHours != 2 {
+		t.Errorf("expected 2, got %v", ht.NodeSilentHours)
 	}
 }
 
 func TestGetHealthThresholdsPartialCustom(t *testing.T) {
 	cfg := &Config{
 		HealthThresholds: &HealthThresholds{
-			InfraDegradedMs: 100000,
+			InfraDegradedHours: 2,
 			// Others left as zero → should use defaults
 		},
 	}
 	ht := cfg.GetHealthThresholds()
 
-	if ht.InfraDegradedMs != 100000 {
-		t.Errorf("expected 100000, got %d", ht.InfraDegradedMs)
+	if ht.InfraDegradedHours != 2 {
+		t.Errorf("expected 2, got %v", ht.InfraDegradedHours)
 	}
-	if ht.InfraSilentMs != 259200000 {
-		t.Errorf("expected default 259200000, got %d", ht.InfraSilentMs)
+	if ht.InfraSilentHours != 72 {
+		t.Errorf("expected default 72, got %v", ht.InfraSilentHours)
 	}
 }
 
 func TestGetHealthMs(t *testing.T) {
 	ht := HealthThresholds{
-		InfraDegradedMs: 86400000,
-		InfraSilentMs:   259200000,
-		NodeDegradedMs:  3600000,
-		NodeSilentMs:    86400000,
+		InfraDegradedHours: 24,
+		InfraSilentHours:   72,
+		NodeDegradedHours:  1,
+		NodeSilentHours:    24,
 	}
 
 	tests := []struct {
diff --git a/cmd/server/db_test.go b/cmd/server/db_test.go
index d571b8d2..9f8b1e1f 100644
--- a/cmd/server/db_test.go
+++ b/cmd/server/db_test.go
@@ -513,10 +513,10 @@ func TestGetNetworkStatus(t *testing.T) {
 	seedTestData(t, db)
 
 	ht := HealthThresholds{
-		InfraDegradedMs: 86400000,
-		InfraSilentMs:   259200000,
-		NodeDegradedMs:  3600000,
-		NodeSilentMs:    86400000,
+		InfraDegradedHours: 24,
+		InfraSilentHours:   72,
+		NodeDegradedHours:  1,
+		NodeSilentHours:    24,
 	}
 	result, err := db.GetNetworkStatus(ht)
 	if err != nil {
@@ -1050,10 +1050,10 @@ func TestGetNetworkStatusDateFormats(t *testing.T) {
 		VALUES ('node4444', 'NodeBad', 'sensor', 'not-a-date')`)
 
 	ht := HealthThresholds{
-		InfraDegradedMs: 86400000,
-		InfraSilentMs:   259200000,
-		NodeDegradedMs:  3600000,
-		NodeSilentMs:    86400000,
+		InfraDegradedHours: 24,
+		InfraSilentHours:   72,
+		NodeDegradedHours:  1,
+		NodeSilentHours:    24,
 	}
 	result, err := db.GetNetworkStatus(ht)
 	if err != nil {
diff --git a/cmd/server/routes.go b/cmd/server/routes.go
index 0bec70a5..aa4c6290 100644
--- a/cmd/server/routes.go
+++ b/cmd/server/routes.go
@@ -213,7 +213,7 @@ func (s *Server) handleConfigCache(w http.ResponseWriter, r *http.Request) {
 func (s *Server) handleConfigClient(w http.ResponseWriter, r *http.Request) {
 	writeJSON(w, ClientConfigResponse{
 		Roles:               s.cfg.Roles,
-		HealthThresholds:    s.cfg.HealthThresholds,
+		HealthThresholds:    s.cfg.GetHealthThresholds().ToClientMs(),
 		Tiles:               s.cfg.Tiles,
 		SnrThresholds:       s.cfg.SnrThresholds,
 		DistThresholds:      s.cfg.DistThresholds,
diff --git a/config.example.json b/config.example.json
index c53a2714..ebde196a 100644
--- a/config.example.json
+++ b/config.example.json
@@ -98,6 +98,13 @@
     "#bookclub",
     "#shtf"
   ],
+  "healthThresholds": {
+    "infraDegradedHours": 24,
+    "infraSilentHours": 72,
+    "nodeDegradedHours": 1,
+    "nodeSilentHours": 24,
+    "_comment": "How long (hours) before nodes show as degraded/silent. 'infra' = repeaters & rooms, 'node' = companions & others."
+  },
   "defaultRegion": "SJC",
   "mapDefaults": {
     "center": [
diff --git a/public/nodes.js b/public/nodes.js
index ff8ac231..4370d3ad 100644
--- a/public/nodes.js
+++ b/public/nodes.js
@@ -89,7 +89,8 @@
 
   function getStatusTooltip(role, status) {
     const isInfra = role === 'repeater' || role === 'room';
-    const threshold = isInfra ? '72h' : '24h';
+    const threshMs = isInfra ? HEALTH_THRESHOLDS.infraSilentMs : HEALTH_THRESHOLDS.nodeSilentMs;
+    const threshold = threshMs >= 3600000 ? Math.round(threshMs / 3600000) + 'h' : Math.round(threshMs / 60000) + 'm';
     if (status === 'active') {
       return 'Active \u2014 heard within the last ' + threshold + '.' + (isInfra ? ' Repeaters typically advertise every 12-24h.' : '');
     }
diff --git a/server-helpers.js b/server-helpers.js
index d04c7029..568efdf9 100644
--- a/server-helpers.js
+++ b/server-helpers.js
@@ -36,18 +36,19 @@ function loadThemeFile(themePaths) {
 function buildHealthConfig(config) {
   const _ht = (config && config.healthThresholds) || {};
   return {
-    infraDegradedMs: _ht.infraDegradedMs || 86400000,
-    infraSilentMs:   _ht.infraSilentMs   || 259200000,
-    nodeDegradedMs:  _ht.nodeDegradedMs  || 3600000,
-    nodeSilentMs:    _ht.nodeSilentMs    || 86400000
+    infraDegraded: _ht.infraDegradedHours || 24,
+    infraSilent:   _ht.infraSilentHours   || 72,
+    nodeDegraded:  _ht.nodeDegradedHours  || 1,
+    nodeSilent:    _ht.nodeSilentHours    || 24
   };
 }
 
 function getHealthMs(role, HEALTH) {
+  const H = 3600000;
   const isInfra = role === 'repeater' || role === 'room';
   return {
-    degradedMs: isInfra ? HEALTH.infraDegradedMs : HEALTH.nodeDegradedMs,
-    silentMs:   isInfra ? HEALTH.infraSilentMs   : HEALTH.nodeSilentMs
+    degradedMs: (isInfra ? HEALTH.infraDegraded : HEALTH.nodeDegraded) * H,
+    silentMs:   (isInfra ? HEALTH.infraSilent   : HEALTH.nodeSilent)   * H
   };
 }
 
diff --git a/server.js b/server.js
index 0a3c652d..31cd6d74 100644
--- a/server.js
+++ b/server.js
@@ -307,7 +307,12 @@ app.get('/api/config/cache', (req, res) => {
 app.get('/api/config/client', (req, res) => {
   res.json({
     roles: config.roles || null,
-    healthThresholds: config.healthThresholds || null,
+    healthThresholds: {
+      infraDegradedMs: HEALTH.infraDegraded * 3600000,
+      infraSilentMs:   HEALTH.infraSilent   * 3600000,
+      nodeDegradedMs:  HEALTH.nodeDegraded  * 3600000,
+      nodeSilentMs:    HEALTH.nodeSilent    * 3600000
+    },
     tiles: config.tiles || null,
     snrThresholds: config.snrThresholds || null,
     distThresholds: config.distThresholds || null,
diff --git a/test-server-helpers.js b/test-server-helpers.js
index c0e720df..6086d583 100644
--- a/test-server-helpers.js
+++ b/test-server-helpers.js
@@ -59,17 +59,17 @@ console.log('\nloadThemeFile:');
 console.log('\nbuildHealthConfig:');
 {
   const h = helpers.buildHealthConfig({});
-  assert(h.infraDegradedMs === 86400000, 'default infraDegradedMs');
-  assert(h.infraSilentMs === 259200000, 'default infraSilentMs');
-  assert(h.nodeDegradedMs === 3600000, 'default nodeDegradedMs');
-  assert(h.nodeSilentMs === 86400000, 'default nodeSilentMs');
+  assert(h.infraDegraded === 24, 'default infraDegraded');
+  assert(h.infraSilent === 72, 'default infraSilent');
+  assert(h.nodeDegraded === 1, 'default nodeDegraded');
+  assert(h.nodeSilent === 24, 'default nodeSilent');
 
-  const h2 = helpers.buildHealthConfig({ healthThresholds: { infraDegradedMs: 1000 } });
-  assert(h2.infraDegradedMs === 1000, 'custom infraDegradedMs');
-  assert(h2.nodeDegradedMs === 3600000, 'other defaults preserved');
+  const h2 = helpers.buildHealthConfig({ healthThresholds: { infraDegradedHours: 2 } });
+  assert(h2.infraDegraded === 2, 'custom infraDegraded');
+  assert(h2.nodeDegraded === 1, 'other defaults preserved');
 
   const h3 = helpers.buildHealthConfig(null);
-  assert(h3.infraDegradedMs === 86400000, 'handles null config');
+  assert(h3.infraDegraded === 24, 'handles null config');
 }
 
 // --- getHealthMs ---
@@ -78,21 +78,21 @@ console.log('\ngetHealthMs:');
   const HEALTH = helpers.buildHealthConfig({});
 
   const rep = helpers.getHealthMs('repeater', HEALTH);
-  assert(rep.degradedMs === 86400000, 'repeater uses infra degraded');
-  assert(rep.silentMs === 259200000, 'repeater uses infra silent');
+  assert(rep.degradedMs === 24 * 3600000, 'repeater uses infra degraded');
+  assert(rep.silentMs === 72 * 3600000, 'repeater uses infra silent');
 
   const room = helpers.getHealthMs('room', HEALTH);
-  assert(room.degradedMs === 86400000, 'room uses infra degraded');
+  assert(room.degradedMs === 24 * 3600000, 'room uses infra degraded');
 
   const comp = helpers.getHealthMs('companion', HEALTH);
-  assert(comp.degradedMs === 3600000, 'companion uses node degraded');
-  assert(comp.silentMs === 86400000, 'companion uses node silent');
+  assert(comp.degradedMs === 1 * 3600000, 'companion uses node degraded');
+  assert(comp.silentMs === 24 * 3600000, 'companion uses node silent');
 
   const sensor = helpers.getHealthMs('sensor', HEALTH);
-  assert(sensor.degradedMs === 3600000, 'sensor uses node degraded');
+  assert(sensor.degradedMs === 1 * 3600000, 'sensor uses node degraded');
 
   const undef = helpers.getHealthMs(undefined, HEALTH);
-  assert(undef.degradedMs === 3600000, 'undefined role uses node degraded');
+  assert(undef.degradedMs === 1 * 3600000, 'undefined role uses node degraded');
 }
 
 // --- isHashSizeFlipFlop ---