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AI Token Calculator

Use this AI token calculator to estimate how many tokens a prompt or text might use. It counts words and characters locally in your browser and gives a simple token estimate for AI planning.

The text never leaves your browser. The estimate runs locally and does not send the content to any API.

Enter some text to estimate tokens.

This is an estimate. Token counts vary by model, language, tokenizer and formatting. Check your provider’s own tools for exact counts.

Runs in your browser with no account and no stored data

How it works

How to use

Paste or type your text. The calculator estimates words, characters and tokens locally in your browser. You can also choose a context window size to see how much space the text might use.

Formula

This calculator uses a simple estimate where 1 token is roughly 4 characters. Real token counts can vary depending on model, language, formatting and tokenizer.

Example

If your text has 4,000 characters, the estimated token count is about 1,000 tokens. If you use a 32,000 token context window, that would use about 3.1 percent of the available context.

When it helps

This calculator is useful when writing prompts, planning AI features, checking whether text might fit inside a context window, or estimating token usage before using an AI API.

What do you want to do next?

Continue to the AI cost calculator if you want to turn the token estimate into cost, or use the percentage calculator to compare shares of a context window.

AI cost calculator
Work out the cost per request and daily, monthly and yearly totals for AI models that charge per token. Enter your own prices from your provider's pricing page.
Calculator
A standard calculator for plus, minus, times and divide with support for decimals, percentages and parentheses.
Percentage calculator
Percent of a number, change between values, and new totals as you type.

FAQ

What is an AI token?+

A token is a small piece of text used by AI models. It can be a word, part of a word, a number, punctuation or spacing.

Is this token count exact?+

No. This calculator gives a simple estimate. Exact token counts depend on the model, tokenizer, language and formatting.

Does my pasted text leave the browser?+

No. The estimate runs locally in your browser. The text is not sent to an API or stored.

How many characters are in one token?+

A common rough estimate is about 4 characters per token in English text. Other languages and formats can differ.

Why does context window size matter?+

The context window is the amount of text an AI model can consider at once. If your prompt, documents and expected output are too large, the request may not fit.

How is this different from the AI Cost Calculator?+

The AI Token Calculator estimates token usage. The AI Cost Calculator uses token usage and pricing to estimate cost.