AI Token Calculator

An Artificial Intelligence (AI) token is the fundamental unit of text measurement utilized by Large Language Models (LLMs) such as OpenAI (ChatGPT), Anthropic (Claude), and Google (Gemini). Unlike standard words, tokens do not have a fixed length. In English, one token is approximately 4 characters or 0.75 words (for example, the word 'hamburger' might be broken into the tokens 'ham', 'bur', and 'ger'). In other languages, a single word is often split into multiple tokens due to non-ASCII characters and different structural roots, meaning non-English texts generally consume more tokens.

This calculator helps developers estimate the payload size of text data before making API requests. Because AI models have strict context window limits (e.g., 8K, 16K, or 128K tokens per prompt) and bill directly based on token usage, knowing the token count prevents overflow errors and helps manage API costs. Disclaimer: The token count provided by this tool is an estimate. Different models employ different tokenization algorithms (such as Byte Pair Encoding or SentencePiece), so the exact token count billed by the official API may vary slightly from the results shown here. This tool is free to use and requires no registration.

All text analysis and token counting processes are executed locally within the web browser. Input data is not transmitted to external servers, ensuring complete privacy.