Free calculator
LLM CO2 calculator
Estimate the carbon footprint of an AI response from the model, prompt tokens and completion tokens. The calculator never needs the text of your prompt.
No prompt content collected
Chrome, Edge and Firefox
MDM deployment
Token metadata only
Estimate one response in seconds
Use this tool to compare models, explain AI usage internally and understand the order of magnitude behind repeated AI requests.
Live estimate
Uses the same
/api/v1/estimate engine as production. No account required. Prompt text is never sent.How to interpret the result
Token metadata only
The estimate uses model name and token counts. You do not need to paste the prompt or answer.
Directional estimate
The result is designed for comparison and internal reporting. Real infrastructure, provider mix and region can vary.
Production tracking
For applications, use the API to track usage over time and aggregate by product, customer or workspace.
Explore the API