Prompt Length & Token Estimator
AI Prompt Length & Token Estimator
Estimate tokens, character count, and word length for ChatGPT, Claude, and Gemini prompts in real-time.
1. Enter Your AI Prompt
Live Token Estimates
0
Est. Tokens (~4 chars/token)
0
Total Characters
0
Total Words
$0.0000
Est. Input Cost (GPT-4o)
Model Context Usage:
- ChatGPT (GPT-4o): Fits easily in 128k context window.
- Claude 3.5 Sonnet: Fits easily in 200k context window.
How to Use the AI Token Estimator
- Input Prompt: Paste your system prompt, instructions, or long query into the text area.
- Review Metrics: Instantly inspect estimated token consumption, word counts, and average API input cost.
- Optimize: Trim or refine your text to stay within model context limits and reduce latency.
Frequently Asked Questions (FAQ)
How are tokens estimated?
In standard English LLM tokenization (such as OpenAI's BPE), 1 token roughly corresponds to 4 characters or 0.75 words.
Why is monitoring prompt token length important?
Tracking token usage helps prevent hitting maximum context limits, reduces API usage fees, and ensures faster model response times.