diff --git a/calculate_average.js b/calculate_average.js
new file mode 100644
index 0000000..c931a81
--- /dev/null
+++ b/calculate_average.js
@@ -0,0 +1,14 @@
+
+const calculateAverage = function calculateAverage(grades) {
+
+  let total = 0;
+  for (let i = 0; i < grades.length; i++) {
+    total += grades[i];
+  }
+
+  let avg = total / grades.length;
+
+  return avg;
+};
+
+export default calculateAverage;
\ No newline at end of file