diff --git a/binary_to_decimal.py b/binary_to_decimal.py
new file mode 100644
index 0000000..d8e8970
--- /dev/null
+++ b/binary_to_decimal.py
@@ -0,0 +1,21 @@
+while True:
+    try:
+        temp = int(input('Binary num: '))
+        binary = temp
+        while temp > 0:
+            if temp % 10 != 0 and temp % 10 != 1:
+                raise
+            temp //= 10
+        break
+    except:
+        print('Invalid Binary Number!')
+        pass
+
+decimal = 0
+position = 0
+while binary > 0:
+    digit = binary % 10
+    decimal += digit * (2**position)
+    binary //= 10
+    position += 1
+print(decimal)