Speed Test
Latency
—
ms
Download
—
Mbps
Upload
—
Mbps
Server: Cloudflare • Adaptive testing for optimal speed on all networks
What is Internet Speed Test?
Internet Speed Test measures your current internet connection's download and upload speeds, plus network latency (ping). It tests your bandwidth by transferring data between your device and Cloudflare servers, providing accurate measurements of your real-world internet performance.
Adaptive Testing Technology
Our adaptive speed test intelligently adjusts to your network conditions. It starts with small 1MB tests and only progresses to larger 10MB and 25MB tests if your connection is fast enough. This means:
- ✓Fast networks get comprehensive 25MB tests for maximum accuracy
- ✓Slow networks complete quickly without wasting time on large transfers
- ✓All results are based on the optimal file size for your connection
Common Use Cases
- •ISP Verification: Check if you're getting the speeds you're paying for
- •Troubleshooting: Diagnose slow connections or streaming buffering issues
- •Network Optimization: Test different WiFi locations or routers
- •Gaming Performance: Check latency and bandwidth for online gaming
Understanding Results
Latency: Lower is better (under 30ms excellent for gaming)
Jitter: Variation in latency (lower is better for real-time apps)
Download: Affects streaming, browsing (25+ Mbps for HD video)
Upload: Important for video calls, file sharing (5+ Mbps recommended)