diff --git a/Conversions/ConvertBase b/Conversions/ConvertBase
new file mode 100644
index 0000000000..9cc857e171
--- /dev/null
+++ b/Conversions/ConvertBase
@@ -0,0 +1,16 @@
+const microConvert = (n, base1, base2) => {
+  let converted = 0;
+  let multiplier = 1;
+  while (n) {
+    converted += (n % base2) * multiplier;
+    multiplier *= base1;
+    n = Math.floor(n / base2);
+  }
+  return converted;
+};
+
+const convertBase = (num, frombase, tobase) => {
+  return microConvert(microConvert(num, frombase, 10), 10, tobase);
+};
+
+export { convertBase };
diff --git a/Conversions/test/ConvertBase.test.js b/Conversions/test/ConvertBase.test.js
new file mode 100644
index 0000000000..aa4b7e5bb7
--- /dev/null
+++ b/Conversions/test/ConvertBase.test.js
@@ -0,0 +1,41 @@
+import { convertBase } from '../ConvertBase'
+
+test('Converting number 10010 from base 4 to base 10 should be 260', () => {
+  const res = convertBase(10010, 4, 10)
+  expect(res).toBe(260)
+})
+
+test('Converting number 1101 from base 2 to base 10 should be 13', () => {
+  const res = convertBase(1101, 2, 10)
+  expect(res).toBe(13)
+})
+
+test('Converting number 213 from base 5 to base 8 should be 53', () => {
+  const res = convertBase(213, 5, 8)
+  expect(res).toBe(72)
+})
+
+test('Converting number 37 from base 8 to base 3 should be 2111', () => {
+  const res = convertBase(37, 8, 3)
+  expect(res).toBe(1011)
+})
+
+test('Converting number 123 from base 6 to base 4 should be 33', () => {
+  const res = convertBase(123, 6, 4)
+  expect(res).toBe(303)
+})
+
+test('Converting number 1010 from base 2 to base 9 should be 74', () => {
+  const res = convertBase(1010, 2, 9)
+  expect(res).toBe(11)
+})
+
+test('Converting number 731 from base 7 to base 5 should be 2121', () => {
+  const res = convertBase(731, 7, 5)
+  expect(res).toBe(2430)
+})
+
+test('Converting number 345 from base 9 to base 10 should be 344', () => {
+  const res = convertBase(345, 9, 10)
+  expect(res).toBe(284)
+})