The fastest way to check your speed

Open Speedtest.net in any web browser, click the big blue button, and wait 30 to 60 seconds. The test measures how fast data travels from your device to Speedtest's servers and back. You'll see three numbers: download speed (how fast you receive data), upload speed (how fast you send data), and ping (how long a signal takes to reach the server). These numbers tell you whether your internet is performing as promised by your provider.

Other free speed tests work the same way. Google's speed test (search "internet speed test" in Google) and Fast.com (Netflix's tool) are equally reliable. The results should be similar across all three. If one test shows much slower speeds than the others, run it again — a background download or video stream can temporarily slow your connection.

Run the test at different times of day. Internet speed often drops during evening hours when more people in your area are online. If you're paying for 100 Mbps but consistently see 40 Mbps at 7 p.m., that's a real problem worth reporting to your provider. If you see 95 Mbps at 2 a.m. and 60 Mbps at 7 p.m., that's normal congestion.

Key Takeaways

  • Speedtest.net, Google's speed test, and Fast.com all measure the same thing and should show similar results within a few Mbps of each other.
  • Download speed is what matters most for streaming and browsing; upload speed matters if you video call, stream live, or upload files regularly.
  • Speeds drop during peak evening hours in most areas, so test at multiple times to see your real performance range.
  • If your speed is consistently 20 percent or more below what you're paying for, contact your provider with your test results as proof.

What the numbers mean

Download speed is measured in Mbps (megabits per second). This is the speed at which data comes to your device. For streaming Netflix in 4K, you need about 25 Mbps. For regular HD streaming, 5 to 10 Mbps is enough. For browsing and email, 1 to 5 Mbps is fine. If your test shows 50 Mbps download, you have plenty for multiple people streaming at once.

Upload speed is how fast data leaves your device. Most people don't notice upload speed because they rarely send large amounts of data. But if you video call on Zoom, stream to Twitch, or upload large files to cloud storage, you need at least 2 to 5 Mbps upload. If your upload speed is below 1 Mbps, video calls will be choppy and file uploads will be slow.

Ping is measured in milliseconds (ms) and shows how long it takes for a signal to reach a server and come back. For web browsing and streaming, ping doesn't matter much. For online gaming or video calls, lower is better — under 50 ms is good, under 100 ms is acceptable. If your ping is 200 ms or higher, you'll notice lag in games and delays in video calls.

Why your speed might be lower than expected

Your provider's advertised speed is the maximum you could theoretically get under perfect conditions. Real-world speeds are almost always lower. A provider promising 100 Mbps typically means you should see 80 to 95 Mbps on a speed test. If you're seeing 50 Mbps or less, something is wrong.

Wi-Fi slows your connection compared to a wired ethernet cable. If you test over Wi-Fi and get 40 Mbps, plug an ethernet cable directly into your router and test again. If the wired speed is 80 Mbps, your Wi-Fi is the problem — you may be too far from the router, or too many devices are connected. If both tests show 40 Mbps, your internet service itself is slow.

Background activity drains speed. Streaming video, downloading files, or running software updates on other devices in your home will lower your test results. Close other browser tabs, pause any downloads, and ask others in your home to stop streaming before you test. For the most accurate result, test on a device connected by ethernet cable with nothing else using the internet.

Testing from different locations in your home

Wi-Fi strength varies by location. Test your speed in the room where you use the internet most — your bedroom, living room, or home office. If you get 60 Mbps right next to the router but only 20 Mbps in another room, your Wi-Fi range is the issue. Moving the router to a central location or adding a Wi-Fi extender can help.

Walls, metal objects, and microwaves interfere with Wi-Fi signals. If your router is in a basement closet surrounded by metal pipes, move it to an open area higher up in your home. If you consistently get poor Wi-Fi speed in one room, that room may have too much interference.

When to contact your provider

Run your speed test three times over several days at different times. Write down the results. If your average download speed is consistently 20 percent or more below what you're paying for, contact your provider with your test results. For example, if you pay for 100 Mbps and consistently see 70 Mbps or lower, that's worth reporting.

Tell your provider the specific speeds you measured, when you tested, and whether you tested over Wi-Fi or ethernet. Provide the results from Speedtest.net or Fast.com — these are the tools providers recognize. Ask them to check your line for problems or offer a speed adjustment if they can't fix it. Some providers will credit your account or lower your bill if they can't deliver the promised speed.

Free tools beyond the basic speed test

Ookla's Speedtest app (available for phones and computers) saves your test history so you can track speed over weeks or months. This history is useful when talking to your provider — you can show them a pattern of slow speeds rather than a single test.

DSLReports Speed Test shows your speed compared to other people in your area with the same provider. This helps you see whether slow speeds are a widespread problem or just your connection. If everyone in your area is seeing slow speeds, the problem is likely your provider's network, not your equipment.

Your router's built-in tools can show you which devices are using bandwidth. Log into your router's admin page (usually 192.168.1.1 in your browser) to see if a device is downloading or streaming without your knowledge. Some routers let you limit bandwidth to specific devices or block them from the network.

Frequently Asked Questions

Why is my speed test slower than my provider's advertised speed?

Advertised speeds are the maximum under ideal conditions. Real-world speeds are typically 80 to 95 percent of that maximum. If you're paying for 100 Mbps and consistently see 70 Mbps or lower, contact your provider. If you see 85 to 95 Mbps, that's normal and your service is working as promised.

Should I test over Wi-Fi or with an ethernet cable?

Test both. Ethernet gives you your true internet speed. Wi-Fi will be slower depending on distance from the router and interference. If ethernet shows 90 Mbps but Wi-Fi shows 30 Mbps, your Wi-Fi needs improvement. If both show 30 Mbps, your internet service is the problem.

How often should I check my internet speed?

Once a month is enough for most people. If you're having problems, test weekly at different times of day to find a pattern. Save your results so you can show your provider if you need to report an issue.

Does a speed test use up my data cap?

Yes, a speed test uses a small amount of data — usually 100 to 750 MB depending on the test. If you have a data cap, run the test sparingly. Most home internet plans don't have data caps, but some wireless home internet services do.

What's a good internet speed for my home?

For one person browsing and streaming, 25 to 50 Mbps is plenty. For a household with multiple people streaming, video calling, and gaming at the same time, 100 Mbps or more is better. Upload speed matters only if you video call frequently or upload large files — 5 Mbps upload is usually enough.