Text Size

Text Length and Byte Size Calculator

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Text Size Calculation Logic

$$\text{Size (bytes)} = \sum_{i=1}^{n} \text{byte}(c_i)$$

Each character $$c_i$$ contributes 1–4 bytes depending on its encoding (e.g. UTF-8).
Common approximations:

• ASCII: 1 byte/char
• Emoji or special symbols: 2–4 bytes/char

The Text Size tool helps measure how much space a given string will occupy in memory or during transmission. It counts total characters and computes the encoded size in bytes and kilobytes (UTF-8 by default). Perfect for API development, form validations, SEO meta field limits, or SMS message planning. It also highlights multibyte characters that may increase payload size.