Aloware's segment calculator shows exactly how many segments your text message will use before you send it. This helps you understand your messaging costs and adjust your message content accordingly, avoiding surprise charges in your campaigns.
Local SMS messages cost $0.15 per segment, and MMS messages cost $0.40 each, plus carrier fees. If you regularly send text campaigns, this tool gives you the visibility to control costs before they happen.
Why segment calculation matters
In SMS messaging, each message is broken into segments of up to 160 characters (using standard GSM-7 encoding). If your message exceeds 160 characters, or includes emojis or special characters, it splits into multiple segments, and each segment is billed separately.
For example, a single emoji switches your message to Unicode (UCS-2) encoding, which cuts the character limit to 70 characters per segment. A 150-character message with an emoji becomes three segments instead of one.
Understanding segmentation helps you:
Control costs - See segment count before sending and avoid unnecessary charges.
Optimize efficiency - Get maximum impact at the lowest possible cost.
Improve engagement - Concise, clear messages tend to get better readership and conversion rates.
You can also use the Broadcast Cost Calculator to estimate the total cost of sending to multiple recipients, factoring in both segmentation and carrier fees.
How to use the segment calculator
Type or paste your message into the message box.
Review the details displayed:
Message detail
The calculator shows your segment count, message length, max segment length, and encoding type together.
These four values tell you the full picture: how many billable units your message creates, how many characters you've used, the per-segment character ceiling based on encoding, and whether your message is using GSM-7 (standard, 160 characters per segment) or Unicode (triggered by emojis or special characters, 70 characters per segment).
If the encoding shows Unicode when you didn't intend it, scan your message for hidden special characters or smart quotes that may have been pasted in.
Price detail
This shows the estimated cost for sending the message once, based on your current plan. Use it as a per-message baseline when projecting broadcast costs across your full contact list.
Encoded message and segments
The calculator splits your message into color-coded blocks, each block representing one segment. This lets you see exactly where the character limit is hit and which part of the message pushed it into an additional segment, so you know precisely where to trim.
Best practices to manage SMS costs
Keep messages under 160 characters - This ensures your message sends as a single segment at the standard rate.
Use plain language - Simplify phrasing without losing meaning to stay within one segment.
Avoid emojis and special characters - These trigger Unicode encoding, reducing the per-segment limit to 70 characters and multiplying your segment count.
Test before sending - Use the segment calculator to refine your message before launching a campaign.
Monitor performance - Track results from shorter, optimized messages and adjust your approach over time.
Target a focused audience - A refined contact list means fewer messages sent and lower overall costs.
Why does pricing fluctuate when broadcasting a message?
Pricing fluctuations during SMS message broadcasts are a common concern, and they arise due to several calculable factors.
These fluctuations are influenced by the number of contacts in your broadcast list and specific characteristics of the message content. Understanding these elements can help control costs effectively.
Factors influencing pricing
Number of contacts
The broader your broadcast list, the higher the cost as each contact represents an individual message sent. Pricing is usually calculated per message per contact, so targeting a larger audience directly increases your total expense.
Message size and content
The size of your text plays a key role in determining the number of segments your message occupies.
Standard SMS messages are typically limited to 160 characters per segment for plain text. Messages exceeding this limit or containing special characters such as emojis or symbols may be segmented into smaller parts, each counted as an additional message.
This segmentation can significantly increase costs. For example, emojis and symbols often use a different encoding system (e.g., UCS-2 instead of GSM-7), which increases the message size and therefore the number of segments.
Additionally, carrier fees can vary and should be considered when calculating the total cost of your SMS campaigns.
Practical tips to minimize costs
Avoid special characters - to keep costs manageable, ensure your text messages only use plain characters. Special characters like emojis, symbols, or non-standard punctuation can increase segment requirements and overall pricing.
Optimize message length - keep messages concise and within the standard SMS length of 160 characters whenever possible to avoid additional segmentation.
Target a focused audience - consider segmenting your contact lists to target only relevant recipients, reducing unnecessary distribution.
Understanding the impact of emojis and special characters
Using emojis or special characters (such as accented letters) changes your message’s encoding to Unicode, which limits you to 70 characters per segment instead of 160.
While emojis can boost engagement, they also increase costs, especially in large campaigns. Be mindful of how you use them to keep your costs under control.