💬 SMS Tool
SMS Character
Counter & Segment Calculator
Real-time GSM-7 and Unicode detection. See exactly how many SMS segments your message uses — and which characters are costing you extra.
✓
GSM-7 Encoding — 160 chars per segment
1
SMS Segments
0
Characters used
160
Chars remaining
160
Per segment
⚠️ Unicode detected. One or more characters in your message require Unicode (UCS-2) encoding. This reduces your limit from 160 → 70 characters per segment, and multi-part messages use 67 characters per segment instead of 153. The highlighted characters below are the cause — replacing them with GSM-7 equivalents will restore the 160-char limit.
Character breakdown — ■ GSM extended (2 chars) ■ Unicode trigger
(start typing to see character breakdown)
Unicode characters found:
💰 Send cost estimator
Total segments sent
1,000
segments × recipients
Estimated total cost
£35.00
at 3.5p per segment
Cost if optimised (1 seg)
£35.00
if message fits 1 segment
📏 SMS Encoding & Segment Reference
| Encoding | Single SMS | Multi-part (per segment) | Trigger |
|---|---|---|---|
| GSM-7 | 160 chars | 153 chars | Standard Latin alphabet + common symbols |
| Unicode (UCS-2) | 70 chars | 67 chars | Any emoji, accented char not in GSM-7, non-Latin script |
Common characters that trigger Unicode encoding:
😊 Any emoji
" " Smart quotes
— Em dash
• Bullet point
é à ñ ü Accented letters
© ® ™ Symbols
[ ] { } ~ ^ \ | Extended GSM (×2 chars)
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