diff --git a/scripts/lib/build_perf/html/measurement_chart.html b/scripts/lib/build_perf/html/measurement_chart.html
index 9acb3785e2..07e92dfe78 100644
--- a/scripts/lib/build_perf/html/measurement_chart.html
+++ b/scripts/lib/build_perf/html/measurement_chart.html
@@ -25,10 +25,13 @@
     tooltip: {
       trigger: 'axis',
       valueFormatter: (value) => {
-        const hours = Math.floor(value/60)
-        const minutes = Math.floor(value % 60)
-        const seconds = Math.floor((value * 60) % 60)
-        return hours + ':' + minutes + ':' + seconds
+        if ('{{ measurement.value_type.quantity }}' == 'time') {
+          const hours = Math.floor(value/60)
+          const minutes = Math.floor(value % 60)
+          const seconds = Math.floor((value * 60) % 60)
+          return hours + ':' + minutes + ':' + seconds
+        }
+        return value.toFixed(2) + ' MB'
       }
     },
     xAxis: {