What token ratio is used?
The default estimate is roughly four characters per token, which is adjustable in future modules.
Check how much room your prompt, documents, and expected answer need inside a model context window.
Tool workspace
Result
Input tokens
15
Reserved output
4,000
Total needed
4,015
Remaining room
123,985 tokens
How it works
Enter your numbers — text length, token counts, model, or request volume.
The result updates instantly as you type, no submit button needed.
Read the breakdown, then adjust inputs to compare scenarios.
Use cases
FAQ
The default estimate is roughly four characters per token, which is adjustable in future modules.
Models need room for both your input and the answer. Large outputs reduce available input space.
Related tools
Analysis
Estimate tokens, words, characters, and reading size before sending a prompt to an AI model.
Finance
Estimate API cost from input tokens, output tokens, request volume, and model pricing.
Writing
Convert rough notes into a clean prompt structure with role, task, context, constraints, and output format.
Use the free browser tools, then save your best ideas into the AiverseWorld prompt library workflow.