diff --git a/pkg/proxy/iptables/proxier.go b/pkg/proxy/iptables/proxier.go
index b2081071f6..5f85684be3 100644
--- a/pkg/proxy/iptables/proxier.go
+++ b/pkg/proxy/iptables/proxier.go
@@ -639,7 +639,8 @@ func (proxier *Proxier) syncProxyRules() {
 
 	start := time.Now()
 	defer func() {
-		metrics.SyncProxyRulesLatency.Observe(metrics.SinceInMicroseconds(start))
+		metrics.SyncProxyRulesLatency.Observe(metrics.SinceInSeconds(start))
+		metrics.DeprecatedSyncProxyRulesLatency.Observe(metrics.SinceInMicroseconds(start))
 		klog.V(4).Infof("syncProxyRules took %v", time.Since(start))
 	}()
 	// don't sync rules till we've received services and endpoints
diff --git a/pkg/proxy/ipvs/proxier.go b/pkg/proxy/ipvs/proxier.go
index f96aee0836..1b1af87b70 100644
--- a/pkg/proxy/ipvs/proxier.go
+++ b/pkg/proxy/ipvs/proxier.go
@@ -719,7 +719,8 @@ func (proxier *Proxier) syncProxyRules() {
 
 	start := time.Now()
 	defer func() {
-		metrics.SyncProxyRulesLatency.Observe(metrics.SinceInMicroseconds(start))
+		metrics.SyncProxyRulesLatency.Observe(metrics.SinceInSeconds(start))
+		metrics.DeprecatedSyncProxyRulesLatency.Observe(metrics.SinceInMicroseconds(start))
 		klog.V(4).Infof("syncProxyRules took %v", time.Since(start))
 	}()
 	// don't sync rules till we've received services and endpoints
diff --git a/pkg/proxy/metrics/metrics.go b/pkg/proxy/metrics/metrics.go
index d442f2da32..c5c1d8feda 100644
--- a/pkg/proxy/metrics/metrics.go
+++ b/pkg/proxy/metrics/metrics.go
@@ -28,10 +28,20 @@ const kubeProxySubsystem = "kubeproxy"
 var (
 	// SyncProxyRulesLatency is the latency of one round of kube-proxy syncing proxy rules.
 	SyncProxyRulesLatency = prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Subsystem: kubeProxySubsystem,
+			Name:      "sync_proxy_rules_latency_seconds",
+			Help:      "SyncProxyRules latency in seconds",
+			Buckets:   prometheus.ExponentialBuckets(0.001, 2, 15),
+		},
+	)
+
+	// DeprecatedSyncProxyRulesLatency is the latency of one round of kube-proxy syncing proxy rules.
+	DeprecatedSyncProxyRulesLatency = prometheus.NewHistogram(
 		prometheus.HistogramOpts{
 			Subsystem: kubeProxySubsystem,
 			Name:      "sync_proxy_rules_latency_microseconds",
-			Help:      "SyncProxyRules latency",
+			Help:      "(Deprecated) SyncProxyRules latency in microseconds",
 			Buckets:   prometheus.ExponentialBuckets(1000, 2, 15),
 		},
 	)
@@ -43,6 +53,7 @@ var registerMetricsOnce sync.Once
 func RegisterMetrics() {
 	registerMetricsOnce.Do(func() {
 		prometheus.MustRegister(SyncProxyRulesLatency)
+		prometheus.MustRegister(DeprecatedSyncProxyRulesLatency)
 	})
 }
 
@@ -50,3 +61,8 @@ func RegisterMetrics() {
 func SinceInMicroseconds(start time.Time) float64 {
 	return float64(time.Since(start).Nanoseconds() / time.Microsecond.Nanoseconds())
 }
+
+// SinceInSeconds gets the time since the specified start in seconds.
+func SinceInSeconds(start time.Time) float64 {
+	return time.Since(start).Seconds()
+}
diff --git a/pkg/proxy/winkernel/metrics.go b/pkg/proxy/winkernel/metrics.go
index 100b6abba8..db91cf1e41 100644
--- a/pkg/proxy/winkernel/metrics.go
+++ b/pkg/proxy/winkernel/metrics.go
@@ -27,10 +27,19 @@ const kubeProxySubsystem = "kubeproxy"
 
 var (
 	SyncProxyRulesLatency = prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Subsystem: kubeProxySubsystem,
+			Name:      "sync_proxy_rules_latency_seconds",
+			Help:      "SyncProxyRules latency in seconds",
+			Buckets:   prometheus.ExponentialBuckets(0.001, 2, 15),
+		},
+	)
+
+	DeprecatedSyncProxyRulesLatency = prometheus.NewHistogram(
 		prometheus.HistogramOpts{
 			Subsystem: kubeProxySubsystem,
 			Name:      "sync_proxy_rules_latency_microseconds",
-			Help:      "SyncProxyRules latency",
+			Help:      "(Deprecated) SyncProxyRules latency in microseconds",
 			Buckets:   prometheus.ExponentialBuckets(1000, 2, 15),
 		},
 	)
@@ -41,6 +50,7 @@ var registerMetricsOnce sync.Once
 func RegisterMetrics() {
 	registerMetricsOnce.Do(func() {
 		prometheus.MustRegister(SyncProxyRulesLatency)
+		prometheus.MustRegister(DeprecatedSyncProxyRulesLatency)
 	})
 }
 
@@ -48,3 +58,8 @@ func RegisterMetrics() {
 func sinceInMicroseconds(start time.Time) float64 {
 	return float64(time.Since(start).Nanoseconds() / time.Microsecond.Nanoseconds())
 }
+
+// Gets the time since the specified start in seconds.
+func sinceInSeconds(start time.Time) float64 {
+	return time.Since(start).Seconds()
+}
diff --git a/pkg/proxy/winkernel/proxier.go b/pkg/proxy/winkernel/proxier.go
index b0289ffe4d..83d3a92fe5 100644
--- a/pkg/proxy/winkernel/proxier.go
+++ b/pkg/proxy/winkernel/proxier.go
@@ -938,7 +938,8 @@ func (proxier *Proxier) syncProxyRules() {
 
 	start := time.Now()
 	defer func() {
-		SyncProxyRulesLatency.Observe(sinceInMicroseconds(start))
+		SyncProxyRulesLatency.Observe(sinceInSeconds(start))
+		DeprecatedSyncProxyRulesLatency.Observe(sinceInMicroseconds(start))
 		klog.V(4).Infof("syncProxyRules took %v", time.Since(start))
 	}()
 	// don't sync rules till we've received services and endpoints