The four key measurements
Every speed test reports four numbers. Download and upload speeds (in Mbps) describe how fast data moves to and from your device. Ping (in ms) is how responsive your connection is, and jitter (in ms) measures how stable that responsiveness is over time.
How much speed do I need?
| Speed | Good for |
|---|---|
| 1–10 Mbps | Basic browsing, email, SD video on one device. |
| 10–50 Mbps | HD streaming, video calls, a few connected devices. |
| 50–200 Mbps | 4K streaming, gaming, busy households, remote work. |
| 200 Mbps+ | Heavy 4K/8K streaming, large downloads, many users at once. |
Speed you need by activity
Bandwidth requirements add up when activities happen at the same time. Here's what common tasks need — see the dedicated guides for detail:
- Streaming — 5–8 Mbps for HD, ~25 Mbps per 4K stream.
- Gaming — only 10–25 Mbps, but low ping matters most.
- Video calls — 3–5 Mbps upload per HD call; stable jitter is key.
- Working from home — ~25 Mbps down / 5–10 Mbps up per person.
What affects your real-world speed
Your measured speed is often lower than your plan — that's normal. The biggest factors are Wi-Fi vs wired (distance and interference), the age of your router, the number of devices sharing the line, peak-time congestion, and how far you are from the test server. If your speed is well below your plan, work through why your internet is slow and how to improve it.
Download vs upload vs latency
Download affects how fast things load and stream; upload affects calls, backups and posting; and ping / jitter determine responsiveness. A great connection is balanced across all four, not just high on download. Curious how yours compares to others? See average speeds by country and by ISP.
Tips for accurate results
- Test over a wired Ethernet connection where possible to remove Wi-Fi variability.
- Close background apps and downloads before testing.
- Run the test a few times and take the average.
- Test at different times of day — networks are often slower at peak evening hours.
- Learn more about how accurate speed tests are.
Frequently asked questions
How accurate is a browser-based speed test?
Browser tests are a reliable estimate of real-world performance. Results can vary with Wi-Fi signal, device capability, browser overhead, and network congestion, so run a few tests for a representative average.
How often should I test my internet speed?
Test when you notice problems, after changing equipment or plans, or to compare different times of day. Testing at a wired connection close to your router gives the cleanest baseline.
Why do results differ between tests?
Network conditions change constantly — congestion, background app usage, and Wi-Fi interference all play a part. Averaging several tests gives the most realistic picture.
Ready to check your connection?
Run a free speed test