diff --git a/core/stores/redis/hook.go b/core/stores/redis/hook.go
index 856c5d5d..b7a0a332 100644
--- a/core/stores/redis/hook.go
+++ b/core/stores/redis/hook.go
@@ -56,7 +56,7 @@ func (h hook) AfterProcess(ctx context.Context, cmd red.Cmder) error {
 		logDuration(ctx, []red.Cmder{cmd}, duration)
 	}
 
-	metricReqDur.Observe(int64(duration/time.Millisecond), cmd.Name())
+	metricReqDur.Observe(duration.Milliseconds(), cmd.Name())
 	if msg := formatError(err); len(msg) > 0 {
 		metricReqErr.Inc(cmd.Name(), msg)
 	}
@@ -103,7 +103,7 @@ func (h hook) AfterProcessPipeline(ctx context.Context, cmds []red.Cmder) error
 		logDuration(ctx, cmds, duration)
 	}
 
-	metricReqDur.Observe(int64(duration/time.Millisecond), "Pipeline")
+	metricReqDur.Observe(duration.Milliseconds(), "Pipeline")
 	if msg := formatError(batchError.Err()); len(msg) > 0 {
 		metricReqErr.Inc("Pipeline", msg)
 	}
diff --git a/core/stores/sqlx/stmt.go b/core/stores/sqlx/stmt.go
index 5dc206a5..cdaece6f 100644
--- a/core/stores/sqlx/stmt.go
+++ b/core/stores/sqlx/stmt.go
@@ -136,7 +136,7 @@ func (e *realSqlGuard) finish(ctx context.Context, err error) {
 		logSqlError(ctx, e.stmt, err)
 	}
 
-	metricReqDur.Observe(int64(duration/time.Millisecond), e.command)
+	metricReqDur.Observe(duration.Milliseconds(), e.command)
 }
 
 func (e *realSqlGuard) start(q string, args ...any) error {
diff --git a/rest/handler/prometheushandler.go b/rest/handler/prometheushandler.go
index c1aa7ae7..cf0d91fc 100644
--- a/rest/handler/prometheushandler.go
+++ b/rest/handler/prometheushandler.go
@@ -3,7 +3,6 @@ package handler
 import (
 	"net/http"
 	"strconv"
-	"time"
 
 	"github.com/zeromicro/go-zero/core/metric"
 	"github.com/zeromicro/go-zero/core/timex"
@@ -38,7 +37,7 @@ func PrometheusHandler(path, method string) func(http.Handler) http.Handler {
 			startTime := timex.Now()
 			cw := &response.WithCodeResponseWriter{Writer: w}
 			defer func() {
-				metricServerReqDur.Observe(int64(timex.Since(startTime)/time.Millisecond), path, method)
+				metricServerReqDur.Observe(timex.Since(startTime).Milliseconds(), path, method)
 				metricServerReqCodeTotal.Inc(path, strconv.Itoa(cw.Code), method)
 			}()
 
diff --git a/tools/goctl/api/gogen/genroutes.go b/tools/goctl/api/gogen/genroutes.go
index 1d6e2df2..8243d5e4 100644
--- a/tools/goctl/api/gogen/genroutes.go
+++ b/tools/goctl/api/gogen/genroutes.go
@@ -129,7 +129,7 @@ rest.WithPrefix("%s"),`, g.prefix)
 				return fmt.Errorf("timeout should not less than 1ms, now %v", duration)
 			}
 
-			timeout = fmt.Sprintf("\n rest.WithTimeout(%d * time.Millisecond),", duration/time.Millisecond)
+			timeout = fmt.Sprintf("\n rest.WithTimeout(%d * time.Millisecond),", duration.Milliseconds())
 			hasTimeout = true
 		}
 
diff --git a/zrpc/internal/clientinterceptors/prometheusinterceptor.go b/zrpc/internal/clientinterceptors/prometheusinterceptor.go
index c682937b..23ab3a75 100644
--- a/zrpc/internal/clientinterceptors/prometheusinterceptor.go
+++ b/zrpc/internal/clientinterceptors/prometheusinterceptor.go
@@ -3,7 +3,6 @@ package clientinterceptors
 import (
 	"context"
 	"strconv"
-	"time"
 
 	"github.com/zeromicro/go-zero/core/metric"
 	"github.com/zeromicro/go-zero/core/timex"
@@ -37,7 +36,7 @@ func PrometheusInterceptor(ctx context.Context, method string, req, reply any,
 	cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
 	startTime := timex.Now()
 	err := invoker(ctx, method, req, reply, cc, opts...)
-	metricClientReqDur.Observe(int64(timex.Since(startTime)/time.Millisecond), method)
+	metricClientReqDur.Observe(timex.Since(startTime).Milliseconds(), method)
 	metricClientReqCodeTotal.Inc(method, strconv.Itoa(int(status.Code(err))))
 	return err
 }
diff --git a/zrpc/internal/serverinterceptors/prometheusinterceptor.go b/zrpc/internal/serverinterceptors/prometheusinterceptor.go
index 5683dbd2..9fcaaef9 100644
--- a/zrpc/internal/serverinterceptors/prometheusinterceptor.go
+++ b/zrpc/internal/serverinterceptors/prometheusinterceptor.go
@@ -3,7 +3,6 @@ package serverinterceptors
 import (
 	"context"
 	"strconv"
-	"time"
 
 	"github.com/zeromicro/go-zero/core/metric"
 	"github.com/zeromicro/go-zero/core/timex"
@@ -37,7 +36,7 @@ func UnaryPrometheusInterceptor(ctx context.Context, req any,
 	info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (any, error) {
 	startTime := timex.Now()
 	resp, err := handler(ctx, req)
-	metricServerReqDur.Observe(int64(timex.Since(startTime)/time.Millisecond), info.FullMethod)
+	metricServerReqDur.Observe(timex.Since(startTime).Milliseconds(), info.FullMethod)
 	metricServerReqCodeTotal.Inc(info.FullMethod, strconv.Itoa(int(status.Code(err))))
 	return resp, err
 }