SMS LENGTH CALCULATOR

SMS text messages are encoded using 7-bit characters you can send up to 160 characters in a single SMS message. When sending Unicode SMS messages, you can only send 70 characters per single SMS message.

SMS parts	Chars used	Chars in SMS	Encoding
1	0	160	7bit

Detailed view

Message content missing

Did you know?

If you use a standard GSM 03.38-character set, single text messages are limited to 160 characters, including spaces. The maximum length of a text message is 918 characters including spaces.
For such languages as Russian, Arabic, or Chinese will restrict your message to a maximum of 70 characters per SMS.
The message length for 7bit encoding is up to 160 characters.

Stiati ca?

If you use a standard GSM 03.38-character set, single text messages are limited to 160 Characters, including spaces. The maximum length of a text message is 918 characters including spaces.

The message length for 7bit encoding is up to 160 characters.

For such languages as Russian, Arabic, or Chinese will restrict your message to a maximum of 70 characters per SMS.

Legenda

Regular 7bit character, present in GSM charset

Escape character 0x1B; required to access |^€{}`{``}`~ characters

User Defined Header (UDH) of the message. Required for multipart sms

Character present in GSM charset, encoded as Unicode character

Character not present in GSM charset, forces to use Unicode encoding

7-BIT ENCODING

This is the most commonly used encoding for messages with GSM 03.38 character set. In this 7-bit alphabet you can use only following characters:

There are also some characters in the GSM 03.38 Extension Table that can be used for the cost of two characters by prepending escape character ESC (0x1B):| ^ € { } [ ] ~

The message length for 7bit encoding is up to 160 characters.

UNICODE ENCODING

Unicode (UCS-2) encoding supports great range of characters and languages compared to very limited alphabet of 7bit encoding.

If your message contains any characters not listed in the 7-bit alphabet, UCS-2 encoding is automatically used. In this case, each message takes up a lot more space, thus the message length is reduced to 70 characters.

MULTIPART SMS MESSAGES

When the message length exceeds 160 characters in case of 7bit encoding (or 70 characters for UCS-2 encoding), the message is split up to multiple separate SMS and sent to the handset separately as well.

To be able to concentrate the messages on the phone, special header (UDH) is set for each message, which states the order and message each part belongs to. Due to this special UDH, the length of each combined 7-bit message is shortened to 153 characters (67 characters for UCS-2).

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