diff --git a/polygerrit-ui/app/elements/core/gr-reporting/gr-reporting.js b/polygerrit-ui/app/elements/core/gr-reporting/gr-reporting.js
index 61251af..5a8ddf6 100644
--- a/polygerrit-ui/app/elements/core/gr-reporting/gr-reporting.js
+++ b/polygerrit-ui/app/elements/core/gr-reporting/gr-reporting.js
@@ -198,7 +198,7 @@
      */
     timeEnd(name) {
       const baseTime = this._baselines[name] || 0;
-      const time = this.now() - baseTime;
+      const time = Math.round(this.now() - baseTime) + 'ms';
       this.reporter(TIMING.TYPE, TIMING.CATEGORY, name, time);
       delete this._baselines[name];
     },
diff --git a/polygerrit-ui/app/elements/core/gr-reporting/gr-reporting_test.html b/polygerrit-ui/app/elements/core/gr-reporting/gr-reporting_test.html
index 67cd329..e88096b 100644
--- a/polygerrit-ui/app/elements/core/gr-reporting/gr-reporting_test.html
+++ b/polygerrit-ui/app/elements/core/gr-reporting/gr-reporting_test.html
@@ -85,10 +85,10 @@
       nowStub.returns(3.123);
       element.timeEnd('foo');
       assert.isTrue(element.reporter.calledWithExactly(
-          'timing-report', 'UI Latency', 'foo', 3.123
+          'timing-report', 'UI Latency', 'foo', '3ms'
       ));
       assert.isTrue(element.reporter.calledWithExactly(
-          'timing-report', 'UI Latency', 'bar', 1
+          'timing-report', 'UI Latency', 'bar', '1ms'
       ));
     });
 
@@ -104,7 +104,7 @@
         sandbox.stub(element, 'now').returns(42);
         element.pluginsLoaded();
         assert.isTrue(element.defaultReporter.calledWithExactly(
-            'timing-report', 'UI Latency', 'PluginsLoaded', 42
+            'timing-report', 'UI Latency', 'PluginsLoaded', '42ms'
         ));
       });