Words to Tokens Calculator
Enter a word count to estimate tokens for each model family.
Runs in your browser — nothing is uploaded—
Details
How to use Words to Tokens Calculator
- Enter your values — the unit for each field is shown next to it.
- The result updates instantly as you type.
- Copy the results, or change inputs to compare scenarios.
Formula & assumptions
GPT ≈ 0.75 words or 4 characters per token (English)
Claude (current tokenizer) ≈ 0.555 words or 2.5 characters per token