Start here: one inference, one footprint

No account. Adjust tokens like in your provider usage JSON — we return the same estimate as our public API, with simple real-world scales so the number sticks.

CO₂e for one inference (no login)

Same engine as POST /api/v1/estimate. Only numbers leave your browser — never prompt text.

Quick models

Model

Prompt tokens

Completion tokens

Ready to measure production traffic?

Create a free account, get API keys, and attribute usage per customer with POST /v1/track.

Create free account Support-style demo (tickets → CO₂)

Full calculator with SEO copy: LLM carbon calculator