diff --git a/README.md b/README.md
index c1db0f3..be09fd2 100644
--- a/README.md
+++ b/README.md
@@ -46,15 +46,15 @@ It exposes the following metrics:
 | Metric | Description |
 |-|-|
 | `unused_disks_count` | How many unused disks are in this provider |
-| `unused_disks_size_gb` | Total size of unused disks in this provider in GB |
+| `unused_disks_total_size_bytes` | Total size of unused disks in this provider in bytes |
 | `unused_disk_size_bytes` | Size of each disk in bytes |
-| `unused_disks_last_used_at` | Last timestamp (unix ms) when this disk was used. GCP only! |
-| `unused_provider_duration_ms` | How long in milliseconds took to fetch this provider information |
+| `unused_disks_last_used_timestamp_seconds` | Last timestamp (unix seconds) when this disk was used. GCP only! |
+| `unused_provider_duration_seconds` | How long in milliseconds took to fetch this provider information |
 | `unused_provider_info` | CSP information |
 | `unused_provider_success` | Static metric indicating if collecting the metrics succeeded or not |
 
 All metrics have the `provider` and `provider_id` labels to identify to which provider instance they belong.
-The `unused_disks_count` and `unused_disks_size_gb` metrics have an additional `k8s_namespace` metric mapped to the `kubernetes.io/created-for/pvc/namespace` annotation assigned to persistent disks created by Kubernetes.
+The `unused_disks_count` and `unused_disks_total_size_bytes` metrics have an additional `k8s_namespace` metric mapped to the `kubernetes.io/created-for/pvc/namespace` annotation assigned to persistent disks created by Kubernetes.
 
 Information about each unused disk is currently logged to stdout given that it contains more changing information that could lead to cardinality explosion.
 
diff --git a/cmd/unused-exporter/exporter.go b/cmd/unused-exporter/exporter.go
index 02d9299..410caec 100644
--- a/cmd/unused-exporter/exporter.go
+++ b/cmd/unused-exporter/exporter.go
@@ -74,14 +74,14 @@ func registerExporter(ctx context.Context, providers []unused.Provider, cfg conf
 			nil),
 
 		size: prometheus.NewDesc(
-			prometheus.BuildFQName(namespace, "disks", "size_gb"),
-			"Total size of unused disks in this provider in GB",
+			prometheus.BuildFQName(namespace, "disks", "total_size_bytes"),
+			"Total size of unused disks in this provider in bytes",
 			append(labels, "k8s_namespace", "type"),
 			nil),
 
 		dur: prometheus.NewDesc(
-			prometheus.BuildFQName(namespace, "provider", "duration_ms"),
-			"How long in milliseconds took to fetch this provider information",
+			prometheus.BuildFQName(namespace, "provider", "duration_seconds"),
+			"How long in seconds took to fetch this provider information",
 			labels,
 			nil),
 
@@ -92,7 +92,7 @@ func registerExporter(ctx context.Context, providers []unused.Provider, cfg conf
 			nil),
 
 		dlu: prometheus.NewDesc(
-			prometheus.BuildFQName(namespace, "disks", "last_used_at"),
+			prometheus.BuildFQName(namespace, "disks", "last_used_timestamp_seconds"),
 			"Kubernetes metadata associated with each unused disk, with the value as the last time the disk was used (if available)",
 			append(labels, []string{"disk", "created_for_pv", "created_for_pvc", "zone"}...),
 			nil),
@@ -176,7 +176,7 @@ func (e *exporter) pollProvider(p unused.Provider) {
 					diskInfoByNamespace[ns] = di
 				}
 				di.Count += 1
-				di.SizeByType[d.DiskType()] += float64(d.SizeGB())
+				di.SizeByType[d.DiskType()] += float64(d.SizeBytes())
 
 				e.logger.Info(fmt.Sprintf("Disk %s last used at %v", d.Name(), d.LastUsedAt()))
 
@@ -190,7 +190,7 @@ func (e *exporter) pollProvider(p unused.Provider) {
 			}
 
 			addMetric(&ms, p, e.info, 1)
-			addMetric(&ms, p, e.dur, float64(dur.Milliseconds()))
+			addMetric(&ms, p, e.dur, float64(dur.Seconds()))
 			addMetric(&ms, p, e.suc, float64(success))
 
 			for ns, di := range diskInfoByNamespace {
@@ -290,7 +290,7 @@ func lastUsedTS(d unused.Disk) float64 {
 		return 0
 	}
 
-	return float64(lastUsed.UnixMilli())
+	return float64(lastUsed.Unix())
 }
 
 func getRegionFromZone(p unused.Provider, z string) string {