E-commerce Website Speed Benchmarks 2025
Comprehensive performance benchmarks for e-commerce websites. Compare your online store against industry standards for Core Web Vitals, Lighthouse scores, and conversion-critical metrics.
Top Performers in E-commerce
Key Insights for E-commerce
- E-commerce sites face unique challenges with product images, dynamic pricing, and personalization scripts.
- Product detail pages (PDPs) typically have 40% slower LCP than category pages due to high-resolution imagery.
- Cart and checkout pages often struggle with CLS due to dynamic price calculations and upsell widgets.
- Sites using modern image formats (WebP, AVIF) see 25-35% faster LCP on product pages.
- Third-party scripts (reviews, recommendations, A/B testing) account for 60% of JavaScript execution time.
Optimization Recommendations
- Implement lazy loading for below-fold product images with proper aspect ratios to prevent CLS
- Use responsive images with srcset to serve appropriately sized images for each device
- Defer non-critical scripts (reviews, recommendations) until after main content loads
- Preload hero product images on PDPs to improve LCP
- Consider edge caching for personalization to reduce TTFB on repeat visits
- Optimize add-to-cart interactions to keep INP under 200ms
Frequently Asked Questions
What is a good LCP for e-commerce sites?+
For e-commerce, aim for LCP under 2.5 seconds. Top performers achieve sub-2 second LCP. Given the image-heavy nature of online stores, this is challenging but achievable with proper image optimization.
How does page speed affect e-commerce conversion rates?+
Studies show that every 100ms improvement in load time can increase conversion rates by 1-2%. Amazon found that every 100ms of latency cost them 1% in sales. For a $10M annual revenue store, that's $100K.
Why are e-commerce sites typically slower than other websites?+
E-commerce sites load high-resolution product images, personalization scripts, review widgets, recommendation engines, analytics, and A/B testing tools. Each adds latency. The key is prioritizing what loads first.
Test Your E-commerce Website
See how your site compares to these industry benchmarks with a free speed test.