Replace formula is useful in replacing a part of the value or content within a cell. With the help of Replace Formula in Excel you are able to replace any content of a cell in Excel. Steps to use REPLACE formula in Excel This article describes the formula syntax and usage of the REPLACE and REPLACEB function in Microsoft Excel. Description REPLACE replaces part of a text string, based on the number of characters you specify, with a different text string. REPLACEB replaces part of a text string, based on the number of bytes you specify, with a different text string. IMPORTANT: These functions may not be available in all languages. REPLACE formula is intended for use with languages that use the single-byte character set (SBCS), whereas REPLACEB is intended for use with languages that use the double-byte character set (DBCS). The default language setting on your computer affects the return value in the following way: REPLACE Formula always counts each character, whether single-byte or double-byte, as 1, no matter what the default language setting is. REPLACEB counts each double-byte character as 2 when you have enabled the editing of a language that supports DBCS and then set it as the default language. Otherwise, REPLACEB counts each character as 1. The languages that support DBCS include Japanese, Chinese (Simplified), Chinese (Traditional), and Korean. Syntax REPLACE(old_text, start_num, num_chars, new_text) REPLACEB(old_text, start_num, num_bytes, new_text) The REPLACE and REPLACEB function syntax has the following arguments: Old_text Required. Text in which you want to replace some characters. Start_num Required. The position of the character in old_text that you want to replace with new_text. Num_chars Required. The number of characters in old_text that you want REPLACE to replace with new_text. Num_bytes Required. The number of bytes in old_text that you want REPLACEB to replace with new_text. New_text Required. The text that will replace characters in old_text.