diff --git a/src/libecmaobjects/ecma-helpers-conversion.c b/src/libecmaobjects/ecma-helpers-conversion.c
new file mode 100644
index 000000000..6c92ec57f
--- /dev/null
+++ b/src/libecmaobjects/ecma-helpers-conversion.c
@@ -0,0 +1,134 @@
+/* Copyright 2014 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/** \addtogroup ecma ---TODO---
+ * @{
+ *
+ * \addtogroup ecmahelpers Helpers for operations with ECMA data types
+ * @{
+ */
+
+#include "ecma-globals.h"
+#include "ecma-helpers.h"
+#include "jerry-libc.h"
+
+/**
+ * ECMA-defined conversion of string (zero-terminated) to Number.
+ *
+ * See also:
+ *          ECMA-262 v5, 9.6
+ *
+ * @return ecma-number
+ */
+ecma_number_t
+ecma_zt_string_to_number (const ecma_char_t *str_p) /**< zero-terminated string */
+{
+  FIXME (Implement according to ECMA);
+
+  ecma_number_t ret_value = 0;
+  while (*str_p != '\0')
+  {
+    if (*str_p >= '0' && *str_p <= '9')
+    {
+      ret_value *= 10;
+      ret_value += (ecma_number_t) (*str_p - '0');
+    }
+    else
+    {
+      JERRY_UNIMPLEMENTED();
+    }
+  }
+
+  return ret_value;
+} /* ecma_zt_string_to_number */
+
+/**
+ * ECMA-defined conversion of UInt32 to String (zero-terminated).
+ */
+void
+ecma_uint32_to_string (uint32_t value, /**< value to convert */
+                       ecma_char_t *out_buffer_p, /**< buffer for zero-terminated string */
+                       size_t buffer_size) /**< size of buffer */
+{
+  FIXME (Implement according to ECMA);
+
+  ecma_char_t *p = (ecma_char_t*) ((uint8_t*) out_buffer_p + buffer_size) - 1;
+  *p-- = '\0';
+
+  do
+  {
+    JERRY_ASSERT (p != out_buffer_p);
+
+    *p-- = (ecma_char_t) ("0123456789"[value % 10]);
+    value /= 10;
+  }
+  while (value != 0);
+
+  if (likely (p != out_buffer_p))
+  {
+    ssize_t bytes_to_move = ((uint8_t*) out_buffer_p + buffer_size) - (uint8_t*) p;
+    __memmove (out_buffer_p, p, (size_t) bytes_to_move);
+  }
+} /* ecma_uint32_to_string */
+
+/**
+ * ECMA-defined conversion of UInt32 value to Number value
+ *
+ * @return number - result of conversion.
+ */
+ecma_number_t
+ecma_uint32_to_number (uint32_t value) /**< unsigned 32-bit integer value */
+{
+  TODO(Implement according to ECMA);
+
+  return (ecma_number_t) value;
+} /* ecma_uint32_to_number */
+
+/**
+ * ECMA-defined conversion of Number value to Uint32 value
+ *
+ * See also:
+ *          ECMA-262 v5, 9.6
+ *
+ * @return number - result of conversion.
+ */
+uint32_t
+ecma_number_to_uint32 (ecma_number_t value) /**< unsigned 32-bit integer value */
+{
+  TODO(Implement according to ECMA);
+
+  return (uint32_t) value;
+} /* ecma_number_to_uint32 */
+
+/**
+ * ECMA-defined conversion of Number value to Int32 value
+ *
+ * See also:
+ *          ECMA-262 v5, 9.5
+ *
+ * @return number - result of conversion.
+ */
+int32_t
+ecma_number_to_int32 (ecma_number_t value) /**< unsigned 32-bit integer value */
+{
+  TODO(Implement according to ECMA);
+
+  return (int32_t) value;
+} /* ecma_number_to_int32 */
+
+/**
+ * @}
+ * @}
+ */
diff --git a/src/libecmaobjects/ecma-helpers.h b/src/libecmaobjects/ecma-helpers.h
index dccc92ee2..1a030611b 100644
--- a/src/libecmaobjects/ecma-helpers.h
+++ b/src/libecmaobjects/ecma-helpers.h
@@ -173,6 +173,13 @@ extern bool ecma_is_property_configurable (ecma_property_t* prop_p);
 
 extern ecma_property_descriptor_t ecma_make_empty_property_descriptor (void);
 
+/* ecma-helpers-conversion.c */
+extern ecma_number_t ecma_zt_string_to_number (const ecma_char_t *str_p);
+extern void ecma_uint32_to_string (uint32_t value, ecma_char_t *out_buffer_p, size_t buffer_size);
+extern uint32_t ecma_number_to_uint32 (ecma_number_t value);
+extern int32_t ecma_number_to_int32 (ecma_number_t value);
+extern ecma_number_t ecma_uint32_to_number (uint32_t value);
+
 #endif /* !JERRY_ECMA_HELPERS_H */
 
 /**
diff --git a/src/libecmaoperations/ecma-array-object.c b/src/libecmaoperations/ecma-array-object.c
index c5eac6714..dbf6ef45b 100644
--- a/src/libecmaoperations/ecma-array-object.c
+++ b/src/libecmaoperations/ecma-array-object.c
@@ -78,7 +78,7 @@ ecma_array_object_reduce_length (ecma_object_t *obj_p, /**< the array object */
 
     // ii.
     ecma_char_t uint32_str_buf[ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32];
-    ecma_op_to_string_uint32 (old_length, uint32_str_buf, sizeof (uint32_str_buf));
+    ecma_uint32_to_string (old_length, uint32_str_buf, sizeof (uint32_str_buf));
 
     ecma_completion_value_t delete_succeeded = ecma_op_object_delete (obj_p,
                                                                       uint32_str_buf,
diff --git a/src/libecmaoperations/ecma-conversion.c b/src/libecmaoperations/ecma-conversion.c
index c693e46bc..1cef6ce38 100644
--- a/src/libecmaoperations/ecma-conversion.c
+++ b/src/libecmaoperations/ecma-conversion.c
@@ -315,110 +315,6 @@ ecma_op_to_object (ecma_value_t value) /**< ecma-value */
   JERRY_UNIMPLEMENTED_REF_UNUSED_VARS(value);
 } /* ecma_op_to_object */
 
-/**
- * ECMA-defined conversion of string (zero-terminated) to Number.
- *
- * See also:
- *          ECMA-262 v5, 9.6
- *
- * @return ecma-number
- */
-ecma_number_t
-ecma_zt_string_to_number (const ecma_char_t *str_p) /**< zero-terminated string */
-{
-  FIXME (Implement according to ECMA);
-
-  ecma_number_t ret_value = 0;
-  while (*str_p != '\0')
-  {
-    if (*str_p >= '0' && *str_p <= '9')
-    {
-      ret_value *= 10;
-      ret_value += (ecma_number_t) (*str_p - '0');
-    }
-    else
-    {
-      JERRY_UNIMPLEMENTED();
-    }
-  }
-
-  return ret_value;
-} /* ecma_zt_string_to_number */
-
-/**
- * ECMA-defined conversion of UInt32 to String (zero-terminated).
- */
-void
-ecma_op_to_string_uint32 (uint32_t value, /**< value to convert */
-                          ecma_char_t *out_buffer_p, /**< buffer for zero-terminated string */
-                          size_t buffer_size) /**< size of buffer */
-{
-  FIXME (Implement according to ECMA);
-
-  ecma_char_t *p = (ecma_char_t*) ((uint8_t*) out_buffer_p + buffer_size) - 1;
-  *p-- = '\0';
-
-  do
-  {
-    JERRY_ASSERT (p != out_buffer_p);
-
-    *p-- = (ecma_char_t) ("0123456789"[value % 10]);
-    value /= 10;
-  }
-  while (value != 0);
-
-  if (likely (p != out_buffer_p))
-  {
-    ssize_t bytes_to_move = ((uint8_t*) out_buffer_p + buffer_size) - (uint8_t*) p;
-    __memmove (out_buffer_p, p, (size_t) bytes_to_move);
-  }
-} /* ecma_op_to_string_uint32 */
-
-/**
- * ECMA-defined conversion of UInt32 value to Number value
- *
- * @return number - result of conversion.
- */
-ecma_number_t
-ecma_uint32_to_number (uint32_t value) /**< unsigned 32-bit integer value */
-{
-  TODO(Implement according to ECMA);
-
-  return (ecma_number_t) value;
-} /* ecma_uint32_to_number */
-
-/**
- * ECMA-defined conversion of Number value to Uint32 value
- *
- * See also:
- *          ECMA-262 v5, 9.6
- *
- * @return number - result of conversion.
- */
-uint32_t
-ecma_number_to_uint32 (ecma_number_t value) /**< unsigned 32-bit integer value */
-{
-  TODO(Implement according to ECMA);
-
-  return (uint32_t) value;
-} /* ecma_number_to_uint32 */
-
-/**
- * ECMA-defined conversion of Number value to Int32 value
- *
- * See also:
- *          ECMA-262 v5, 9.5
- *
- * @return number - result of conversion.
- */
-int32_t
-ecma_number_to_int32 (ecma_number_t value) /**< unsigned 32-bit integer value */
-{
-  TODO(Implement according to ECMA);
-
-  return (int32_t) value;
-} /* ecma_number_to_int32 */
-
 /**
  * @}
  * @}
diff --git a/src/libecmaoperations/ecma-conversion.h b/src/libecmaoperations/ecma-conversion.h
index d3a85ffb5..be1ef4a86 100644
--- a/src/libecmaoperations/ecma-conversion.h
+++ b/src/libecmaoperations/ecma-conversion.h
@@ -46,11 +46,6 @@ extern ecma_completion_value_t ecma_op_to_primitive (ecma_value_t value, ecma_pr
 extern ecma_completion_value_t ecma_op_to_boolean (ecma_value_t value);
 extern ecma_completion_value_t ecma_op_to_number (ecma_value_t value);
 extern ecma_completion_value_t ecma_op_to_object (ecma_value_t value);
-extern ecma_number_t ecma_zt_string_to_number (const ecma_char_t *str_p);
-extern void ecma_op_to_string_uint32 (uint32_t value, ecma_char_t *out_buffer_p, size_t buffer_size);
-extern uint32_t ecma_number_to_uint32 (ecma_number_t value);
-extern int32_t ecma_number_to_int32 (ecma_number_t value);
-extern ecma_number_t ecma_uint32_to_number (uint32_t value);
 
 /**
  * @}