What's the difference between UTF-8 and UTF-16?

UTF-8 uses 1 byte for ASCII characters and up to 4 bytes for other Unicode characters. UTF-16 uses 2 bytes for most characters and 4 bytes for supplementary characters (emoji, rare scripts).

Why is the ASCII size sometimes N/A?

ASCII only supports characters with code points below 128. If your text contains any Unicode characters (accented letters, emoji, non-Latin scripts), it cannot be represented in pure ASCII.

Text Size Calculator

Calculate the byte size of your text in UTF-8, UTF-16, and ASCII encodings. Also shows character count, word count, and line count.

Load file

Input

Characters

Words

Lines

UTF-8 Bytes

UTF-16 Bytes

ASCII Bytes

ASCII Compatible

—

Was this tool helpful?

Send output to:

How to use Text Size Calculator

Paste or type your text into the input box.
View the live metrics: characters, words, lines, and byte sizes.
Edit your text and watch the metrics update instantly.

Text Size Calculator అంటే ఏమిటి?

This tool calculates the exact byte size of text in different character encodings. UTF-8 uses 1-4 bytes per character, UTF-16 uses 2 or 4 bytes, and ASCII uses 1 byte per character (only for characters below U+0080).

It also provides a quick summary of character count, word count, and line count, making it useful for developers checking payload sizes, content writers monitoring length, and anyone working with text encoding constraints.

FAQ

What's the difference between UTF-8 and UTF-16?: UTF-8 uses 1 byte for ASCII characters and up to 4 bytes for other Unicode characters. UTF-16 uses 2 bytes for most characters and 4 bytes for supplementary characters (emoji, rare scripts).
Why is the ASCII size sometimes N/A?: ASCII only supports characters with code points below 128. If your text contains any Unicode characters (accented letters, emoji, non-Latin scripts), it cannot be represented in pure ASCII.

Related tools

Author

1Stop Tools"The Toolsmith"

Editorial Team at 1Stop Tools

The 1Stop Tools editorial team tests, reviews, and curates every utility on this platform. We believe tools should be free, fast, and private, with no accounts, no uploads, and no tracking. Every tool on this site runs entirely in the browser, and we test on multiple devices and browsers to ensure reliability for everyone, everywhere, on any connection.

📖 Text Size Calculator on Wikipedia·Counting & Analysis on Wikipedia·Text Size Calculator on Britannica

Text Size Calculator

Something went wrong

How to use Text Size Calculator

Text Size Calculator అంటే ఏమిటి?

FAQ

Related tools

Author

People also use

Ad blocker detected

Keyboard shortcuts