---
title: "Website Carbon Footprint Calculator & Tracking (2026) — Lemwatch"
description: "Measure CO2 emissions per page load, detect green hosting, and get prioritised fixes to cut your website's carbon footprint. Continuous tracking, not a one-off score."
canonical: "https://lemwatch.com/features/carbon-footprint"
source: "https://lemwatch.com"
---

# Website carbon footprint, measured the right way

> Lemwatch applies the Sustainable Web Design v4 model — page weight × grid intensity × visitor share — to give a per-page CO₂ estimate you can defend in a sustainability report.

## How the carbon footprint check works

 Lemwatch's carbon footprint runs on every site you monitor without extra configuration. Results are scored against a defensible baseline, surfaced in the dashboard with plain-English root causes, and routed through the same alert pipeline as every other check — so you don't end up with separate inboxes for separate signals.

### What it catches

- Real regressions , not noise — every alert carries the rule that triggered it and the evidence that caused the trigger.

- Multi-region confirmation on transient signals, so you don't wake up at 3am for a single failed probe from one location.

- Historical context — every check writes to a timeline so you can see "first time this has happened in 90 days" versus "this fires twice a week".

### How it fits with the other 20+ checks

 Carbon footprint is one of more than 20 checks Lemwatch runs on every site — uptime, Core Web Vitals, SEO health, security headers, SSL, DNS, content changes, broken links, and more. They share one alert pipeline, one dashboard, and one bill. You don't need a separate tool for each.

### Tier availability

 This check runs on Free, Pro, and Agency. Free covers 10 sites. Pro ($19/mo) covers 50 and adds API + webhook access. Agency ($59/mo) covers 100 and adds white-label status pages and priority support.


## Related

- [Conversion optimization](https://lemwatch.com/features/conversion-optimization)
- [Cookie compliance](https://lemwatch.com/features/cookie-compliance)
- [Core Web Vitals](https://lemwatch.com/features/core-web-vitals)
- [DNS monitoring](https://lemwatch.com/features/dns-monitoring)
- [All features](https://lemwatch.com/features)
- [Browse use cases](https://lemwatch.com/use-cases)
- [Lemwatch pricing](https://lemwatch.com/pricing)
- [Content freshness](https://lemwatch.com/features/content-freshness)