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Lighthouse Score Calculator – Visualize and Adjust Web Performance Metrics
Use the Lighthouse Score Calculator to simulate how changes in web performance metrics like First Contentful Paint (FCP), Time to Interactive (TTI), and Cumulative Layout Shift (CLS) affect your overall Lighthouse performance score. Ideal for developers, SEOs, and performance auditors who want quick, data-driven insights.
Why Use Our Lighthouse Score Calculator?
✅ Instantly simulate changes to key Lighthouse metrics
✅ Visualize how metrics impact the overall performance score
✅ Trusted by developers and performance optimization professionals
✅ Completely free and browser-based – no installation required
How to Use the Lighthouse Score Calculator?
Adjust the values of metrics such as FCP, LCP, TTI, TBT, CLS, etc., directly in the tool.
Observe how each metric affects your Lighthouse score dynamically.
Use this insight to optimize real-world performance on your website.
Try different device types and Lighthouse versions using the dropdowns in the tool.
What Is Lighthouse and Why Does It Matter?
Lighthouse is an open-source tool by Google that audits the performance, accessibility, SEO, and best practices of web pages. Understanding how each metric contributes to your performance score is essential for improving page load speed, user experience, and search engine rankings.
Start Exploring Your Lighthouse Score Now!
Use the interactive Lighthouse Score Calculator below to model how your site performs and discover areas for optimization. Experiment freely and take the guesswork out of performance tuning!
