By CalculatorInn Team · Updated: 2026-03-22 · Free & accurate · Instant results
Estimate the number of tokens in a text prompt. Tokens are roughly 4 characters or ¾ of a word on average. Useful for OpenAI, Claude, Gemini, and other LLM APIs.
Interactive Prompt Token Estimator
JavaScript is required for the interactive calculator. Enable JavaScript to use this tool.
Tokens ≈ Word Count × 1.33
On average, one English word is about 1.33 tokens. This is an approximation — actual token counts vary by model and tokenizer.
Input: 5,000 words at $3/1M tokens
≈ 6,650 tokens, $0.01995
5000 × 1.33 = 6650 tokens.
A token is a chunk of text that LLMs process. It can be a word, part of a word, or punctuation. English text averages about 1.33 tokens per word.
No — actual token counts depend on the specific tokenizer used by each model. Use this as a quick estimate for budgeting.
Use the official tokenizer for your model, such as OpenAI's tiktoken library or Anthropic's token counter.
Fast, accurate calculators for finance, work, tech, and everyday math. Clear formulas and instant answers.
Browse 600+ free online calculators for finance, math, health, tech, business, education, salary, time, and unit conversions. Instant, accurate results with formulas and worked examples.