AI Token Calculator

What is an AI token?

An AI token is a small piece of text used by language models when reading and generating content. A token can be a full word, part of a word, punctuation, whitespace, or a symbol. AI models usually count usage by tokens instead of words.

For simple English text, one token is often around four characters or about three quarters of a word. Code, JSON, URLs, numbers, emojis, and multilingual text can produce different token counts.

Why token count matters

• Context limit: every model has a maximum number of tokens it can read and write in one request.
• Cost: many AI APIs charge separately for input tokens and output tokens.
• Performance: shorter prompts are often faster and easier to debug.
• Prompt design: token estimates help you decide what context is useful and what can be removed.

How this calculator works

QuickDeveloperTools estimates tokens from character count and word count. The text type selector adjusts the estimate for normal text, code-heavy prompts, and short or multilingual text. This is useful for planning, but it is not a model-specific tokenizer.

For exact billing, always compare with your AI provider's usage dashboard or official tokenizer. Use this page as a fast planning tool before sending prompts, documents, transcripts, or code to an AI model.

Prompt cost example

Estimated cost =
(input tokens / 1,000,000 * input price)
+ (output tokens / 1,000,000 * output price)

Related tools

Compare AI tools and coding assistants

Open Word Counter

Format JSON before adding it to a prompt

Compare two prompt versions