Prelude | The trust layer between your signups and your business.

Message Segment Calculator

See how your message will be split into SMS segments, and which characters push it into Unicode encoding.

What's the difference between GSM-7 and UCS-2?

GSM-7 uses the standard SMS alphabet, with 160 characters per segment.

UCS-2 is used when a character falls outside that alphabet, like an emoji or some languages such as Chinese. Segments then shrink to 70 characters, so the same text needs more of them.