LEFTB function

The LEFTB function returns the left portion of a string up to a certain number of bytes.

Parts of a LEFTB function 

LEFTB(string, num_of_bytes)

Part Description
string The string from which the left portion will be returned.
num_of_bytes (Optional) The number of bytes to return from the left side of 'string'.


  • LEFTB returns the same value as LEFT if the input string only has single-byte characters
  • num_of_bytes must be greater than or equal to zero.
  • If num_of_bytes is greater than the length of text in bytes, LEFTB returns all of text.
  • If num_of_bytes is omitted, it is assumed to be 1.


  A B C
1 Input Formula Output
2 Aeñ =LEFTB(A2, 2) Ae
3 Aeñ =LEFT(A3,2) Ae
4 熊本 =LEFTB(A4, 2) ?
5 熊本 =LEFT(A5,2) 熊本

Related functions

  • MIDB: ​The MIDB function returns a section of a string starting at a given character and up to a specified number of bytes.
  • RIGHTB: The RIGHTB function returns the right portion of a string up to a certain number of bytes.
  • LENB: The LENB function returns the length of a string in bytes.
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