convertion: ounce to kilogram (#1248)

* Added ounces to kilograms convertion

* Added PR suggestions

* changed to export default

Conversions/OuncesToKilograms.js

@@ -0,0 +1,11 @@
+/**
+ * This function converts ounces to kilograms
+ * https://en.wikipedia.org/wiki/Ounce
+ * @constructor
+ * @param {number} oz - Amount of ounces to convert to kilograms
+ */
+const ouncesToKilograms = (oz) => {
+  return oz * 28.3498 / 1000
+}
+
+export default ouncesToKilograms

Conversions/test/OuncesToKilogram.test.js

@@ -0,0 +1,5 @@
+import ouncesToKilograms from '../OuncesToKilograms'
+
+test('Convert 60 ounces to kilograms', () => {
+  expect(parseFloat(ouncesToKilograms(60).toFixed(3))).toBe(1.701)
+})