SMS Segment & Character
Counter Calculator for Nepal
See exactly how many SMS segments your message will use and how many credits it will cost — before you send it. Works for both plain English text and Nepali (Devanagari) script, and shows you precisely which characters push your message into more expensive Unicode encoding.
How SMS Segments & Character Limits Actually Work
SMS is billed by the carrier per segment, not per "message." A message longer than one segment is silently split into multiple parts and reassembled on the recipient's phone — but you're charged for every part.
| Encoding | Triggered by | Single segment | Each additional segment |
|---|---|---|---|
| GSM-7 | Plain English letters, digits, basic punctuation | 160 characters | 153 characters |
| Unicode (UCS-2) | Any Nepali/Devanagari script, emoji, or most accented characters | 70 characters | 67 characters |
Why Nepali text costs more per character
Devanagari script (the script Nepali is written in) isn't part of the 160-character GSM-7 alphabet international SMS was originally designed around. The moment a message contains even one Nepali character, the entire message — not just that character — switches to Unicode encoding, dropping the budget from 160 to 70 characters per segment. This isn't a NepalOTP-specific rule; it's how every SMS carrier in the world bills Unicode messages, and it's the reason Nepali-language SMS campaigns are consistently more expensive than English ones of the same visible length.
It's all-or-nothing, not per character
A common misconception is that only the Nepali characters themselves "cost more." In reality, encoding is decided for the whole message at once. A 150-character message that's 149 characters of English and just one emoji or Nepali word still drops to the 70-character Unicode budget for its entire length — turning what would have been 1 segment in English into 3 segments once Unicode applies.
5 Ways to Reduce Your SMS Segment Count
Small wording changes can keep a message inside one segment instead of spilling into two or three — cutting your per-message cost without cutting your message short.
- Avoid emoji. Even one emoji forces the entire message into 70-char Unicode segments.
- Watch for smart quotes. Curly quotes ( " " ' ' ) and em dashes (—) inserted by word processors or autocorrect aren't in GSM-7 — use straight quotes and hyphens instead.
- Decide upfront: English or Nepali. Mixing scripts doesn't average the cost — the whole message pays the Unicode rate the moment either language is present.
- Front-load your offer. Put the discount/CTA in the first sentence in case the message does split — recipients often only read the first segment's preview.
- Check before you send. Paste your final message into the calculator above — it shows the exact segment count NepalOTP will bill, before you commit.
Frequently Asked Questions
How many characters are in one SMS?
A single-part SMS holds 160 characters in plain English/GSM-7 text, or 70 characters if it contains any Unicode character such as Nepali script, emoji, or most accented letters.
Why does my Nepali message use more segments than English?
Devanagari script isn't part of GSM-7, so any Nepali text forces the whole message into Unicode encoding, allowing only 70 characters per segment instead of 160.
Does one emoji really change the whole message encoding?
Yes. Encoding applies to the whole message, not per character — a single emoji anywhere switches the entire message to Unicode.
How much does an SMS segment cost on NepalOTP?
1 prepaid credit per segment, for both transactional templates and bulk SMS — direct pass-through pricing with no markup for message length.
How can I reduce the number of segments?
Avoid emoji and Nepali script if GSM-7 is acceptable, avoid smart-quote punctuation, and keep the message under 160 (English) or 70 (Nepali) characters.
Is this calculator accurate for the SMS I actually send?
Yes — it uses the same GSM 03.38 character rules and segment thresholds NepalOTP's own billing engine uses for every transactional and bulk SMS sent through the platform.
Stop guessing your SMS cost.
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