Run a speed test on any device connected to your network

The fastest way to check your internet speed is to visit a speed test website on any device — phone, tablet, or computer — that connects to your home WiFi or ethernet. Open a web browser and go to Speedtest.net, Fast.com, or Google speed test (type "internet speed test" into Google's search box). Each site works the same way: click the button to start, wait 30 to 60 seconds while the site measures your connection, and you'll see three numbers.

Those three numbers tell you what matters. read speed is how fast data comes to you — this is what you notice when you load a webpage or stream video. Upload speed is how fast you send data out — this matters if you video call, upload photos, or work from home. Ping (measured in milliseconds) is how long it takes your device to talk to a server and back; lower is better, and anything under 50 milliseconds is fine for most people.

Key Takeaways

  • Visit Speedtest.net, Fast.com, or Google's speed test tool and click start to see your read speed, upload speed, and ping in about a minute.
  • Run the test on a device connected by ethernet cable for the most accurate result, since WiFi can show slower speeds even when your internet is fine.
  • Test at different times of day and from different rooms to spot whether your WiFi signal is weak or your internet slows down during peak hours.
  • Compare your results to what your internet provider promised you in your contract to see if you're getting what you pay for.

Connect by ethernet cable for the most honest result

WiFi is convenient but it masks the true speed of your internet. If you plug a device directly into your router with an ethernet cable, you'll see the real speed your internet provider is delivering. This matters because WiFi signal weakens with distance, walls, and interference from other devices — so a slow WiFi speed test doesn't mean your internet is slow, it means your WiFi is weak.

If you can't run a test by ethernet, at least test from the same room as your router and as close as possible. Note the WiFi speed, then move to another room and test again. If the speed drops sharply in a distant room, your WiFi is the problem, not your internet. If the speed stays the same everywhere, your WiFi is working fine and the issue is elsewhere.

Test at different times to spot peak-hour slowdowns

Internet speed often changes depending on when you test. Run a speed test in the morning, then again in the evening when more people in your neighborhood are online. If your evening speed is much lower than your morning speed, your internet provider's network is congested during peak hours — this is common in areas where many people share the same lines.

Write down the results each time you test, including the time of day. After a week, you'll see a pattern. If speeds are consistently lower than what you're paying for, contact your provider with these numbers. If speeds are fine in the morning but slow at night, the problem is network congestion, and your provider may not be able to fix it without upgrading the lines in your area.

Compare your results to your contract

Your internet bill should list the speed you're paying for — usually written as something like "100 Mbps read" or "50/10 Mbps" (read/upload). Run a speed test and compare. You don't need to match exactly; the Federal Communications Commission allows providers to deliver 90 percent of the advertised speed, so if you're paying for 100 Mbps, you should see at least 90 Mbps.

If your speed test shows less than 90 percent of what you're paying for, take a screenshot of the result and contact your provider. Have them check your line for problems. Sometimes a loose cable, a failing modem, or damage outside your home can reduce speed, and the provider can fix it for free.

Understand what the numbers mean for what you actually do

read speed is what matters most for everyday use. Streaming video in HD needs about 5 Mbps, 4K video needs about 25 Mbps, and web browsing needs only 1 to 3 Mbps. If you have 50 Mbps read and live alone, you can stream video and browse at the same time without slowdown. If you have 50 Mbps and five people in your house all streaming at once, you'll see buffering.

Upload speed matters less for most people but becomes important if you work from home on video calls, upload large files, or stream to social media. Most people need only 5 to 10 Mbps upload. Ping matters mainly for online gaming and video calls — if your ping is above 100 milliseconds, you might notice lag in games or slight delays in video calls.

Use your phone to test when your computer is off

If you want to know whether your internet is slow or just your computer, test on your phone instead. Open a speed test app or website on your phone while your computer is shut down. If your phone shows fast speed but your computer was slow, your computer has a problem — maybe a virus, too many programs running, or an old WiFi card. If your phone also shows slow speed, your internet itself is the issue.

Speed test apps for phones work the same as websites: read one from your phone's app store (Speedtest by Ookla is the most common), open it, and tap start. The results will be the same as on a computer, and you can run this test anywhere in your house to check WiFi strength in different rooms.

Know when to test again

Test your speed once a month to watch for changes. If speed drops suddenly, something has changed — your provider may have had an outage, your equipment may be failing, or interference may have appeared. If speed slowly drops over months, your modem or router may be aging and need replacement.

Also test after you make changes. If you move your router, add a WiFi extender, or switch providers, run a new speed test to see whether the change helped. Keep a straightforward list of dates and speeds so you can spot trends.

Frequently Asked Questions

Why is my WiFi speed slower than my ethernet speed?

WiFi signal weakens with distance and walls, and it shares bandwidth with other devices. Ethernet connects directly to your router with a cable, so it shows your true internet speed. If WiFi is much slower, move your router to a central location, away from walls and metal objects, or switch to a 5 GHz WiFi band if your router supports it.

What if my speed test shows different results each time?

Small changes are normal — speed tests measure at that exact moment, and network traffic changes second to second. If results vary wildly, run the test several times and average them. If one test shows 50 Mbps and the next shows 10 Mbps, something is interfering with your connection, like another device using bandwidth or WiFi interference from a neighbor's network.

Do I need to close other programs before I test?

Yes. Close web browsers, streaming apps, and anything else using the internet before you test. These programs use bandwidth and will make your speed test slower than your actual available speed. The speed test itself needs all your bandwidth to measure accurately.

Can I test my internet speed on my smart TV?

Most smart TVs don't have a web browser, so you can't visit a speed test website. Test on a phone, tablet, or computer instead. If your TV is buffering but your phone's speed test shows fast internet, the problem is your TV's WiFi chip or the distance between your TV and router, not your internet speed.

What does "ping" mean and why does it matter?

Ping measures the round-trip time for data to travel from your device to a server and back, shown in milliseconds. For video calls and web browsing, ping under 100 milliseconds is fine. For online gaming, you want ping under 50 milliseconds to avoid lag. High ping (over 150 milliseconds) causes noticeable delays in real-time activities.