diff --git a/C/KaratsubaAlgorithm.c b/C/KaratsubaAlgorithm.c
new file mode 100644
index 0000000..bdf7303
--- /dev/null
+++ b/C/KaratsubaAlgorithm.c
@@ -0,0 +1,23 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int KaratsubaAlgorithm(char* str1, char* str2){
+    int i = 0, j = 0;
+    int num1 = 0, num2 = 0;
+    while (str1[i] != '\0')
+    {
+        num1 *= 2;
+        if (str1[i] == '0' || str1[i] == '1') num1 += str1[i] - '0';
+        else return -1;
+        i++;
+    }
+    while (str2[j] != '\0')
+    {
+        num2 *= 2;
+        if (str2[j] == '0' || str2[j] == '1') num2 += str2[j] - '0';
+        else return -1;
+        j++;
+    }
+    return num1 * num2;
+}
\ No newline at end of file
diff --git a/C/README.md b/C/README.md
index 8b13789..131dde6 100644
--- a/C/README.md
+++ b/C/README.md
@@ -1 +1,2 @@
-
+# KaratsubaAlgorithm
+Karatsuba Algorithm takes two strings are function arguments. Converts them from binary string to a decimal value, and return product of the two numbers. If the numbers are invalid, or any character in the string is neither 1 nor 0, -1 is returned.