diff --git a/pendulum/main.js b/pendulum/main.js
index 10f4922b..ac251502 100644
--- a/pendulum/main.js
+++ b/pendulum/main.js
@@ -300,6 +300,6 @@ function handleClick(event)
         theta = helper.angleBetween(createVector(0, -1));
         // alert(degrees(theta));
 
-        document.getElementById("inst").innerHTML = "Mass: " + m + " kg --- Moment of inertia: " + inertia.toFixed(3) + " kgm^-2 --- Canvas is 2m wide --- Simulated material is aluminum";
+        document.getElementById("inst").innerHTML = "Mass: " + m.toFixed(3) + " kg --- Moment of inertia: " + inertia.toFixed(3) + " kgm^-2 --- Canvas is 2m wide --- Simulated material is aluminum";
     }
 }
\ No newline at end of file