diff --git a/tinygrad/viz/js/index.js b/tinygrad/viz/js/index.js
index 08c363d39d..c6d694c781 100644
--- a/tinygrad/viz/js/index.js
+++ b/tinygrad/viz/js/index.js
@@ -221,7 +221,13 @@ async function renderProfiler() {
         ctx.closePath();
         ctx.fill();
         // NOTE: y coordinates are in reverse order
-        for (let i = 0; i < x.length - 1; i++) rectLst.push({ x0:x[i], x1:x[i+1], y0:e.y1[i], y1:e.y0[i], arg:e.arg });
+        for (let i = 0; i < x.length - 1; i++) {
+          let tooltipText = e.arg.tooltipText;
+          if (yscale != null && ((yaxisVal=yscale.invert(e.y1[i]))>0)) {
+            tooltipText += `\nTotal: ${formatUnit(yaxisVal, data.axes.y.fmt)}`;
+          }
+          rectLst.push({ x0:x[i], x1:x[i+1], y0:e.y1[i], y1:e.y0[i], arg:{...e.arg, tooltipText} });
+        }
         continue;
       }
       // contiguous rect