Context Window Calculator
See how much of a model's context window your text fills
GPT-4o — OpenAI
Token Count0 / 128,000
0.0% % Filled
Token Count
0
Context Window
128,000
Context Used
0.0%
Tokens Remaining
128,000
About Context Window Calculator
Calculate how much of a model's context window your text uses. See tokens used, percentage filled, tokens remaining, and estimated API cost for major models.
Context Window Calculator is a free tool in the AI Tools category on BrowseryTools. It runs entirely in your browser — your data is never uploaded to a server, and there's no registration, no ads, and no watermarks, so your privacy is fully preserved.
Frequently asked questions