# Sustrax Vita — free carbon footprint calculator

> Browser-based personal footprint estimates from activity data or labelled estimates, with bundled factors and local browser storage. Not a compute API.

Reviewed: 26 October 2026.

## Calculator guidance
- [Usage, methodology and privacy guide](https://calculator.carbonfootprint.com/agent-guide.md): Routes, inputs/units, estimate assumptions, local persistence, evidence gaps and when to consider hosted Sustrax.
- [Full calculator](https://calculator.carbonfootprint.com/calculator.aspx?tab=1): Household energy, travel and Secondary spending.
- [Iframe calculator](https://iframe.app.sustrax.com/calculator): The free calculator for embedding.
- [Single flight form](https://singletabmodeoffline.app.sustrax.com/form?name=flight): Single-form variant; see the guide for supported form names.

## Business needs
- [Hosted app agent guide](https://app.sustrax.com/agent-guide.md): Authorised account workflows, retained records and reporting, subject to plan and permissions.
- [Hosted app guidance index](https://app.sustrax.com/llms.txt): Discover maintained Sustrax account guidance.
- [Sustrax](https://www.sustrax.com): Explore hosted software for ongoing business needs; verify current plan, retention, reporting and team capabilities.
- [Business Carbon Calculator](https://www.carbonfootprint.com/businesscarboncalculator.html): Business product information.

Prefer actual usage to estimates. Do not invent missing inputs, factor accuracy, source assurance or API access. Respect the user's choice to use the free tool.