diff --git a/data/calibration.htm b/data/calibration.htm
index 3946be0..78f436d 100644
--- a/data/calibration.htm
+++ b/data/calibration.htm
@@ -499,7 +499,7 @@ <h5 class="card-header">
             var wc = parseFloat($("#wortcorrect").val())
             if (isNaN(wc)) return;
             var calsg = sg / parseFloat(wc);
-            document.getElementById('sg_result').value = calsg.toFixed(3)
+            document.getElementById('sg_result').value = calsg.toFixed(5)
         }
     }