Run a speed test directly in your web browser
The fastest way to test your internet speed is to open any web browser and visit Speedtest.net, Fast.com, or Google Speed Test. Each one is free and takes about one minute. You do not need to read or install anything.
Go to the website, click the large button in the center of the page (usually labeled "Go" or "Start Test"), and wait while the tool measures how fast data travels to and from your computer. When it finishes, you will see three numbers: read speed, upload speed, and ping (measured in milliseconds). read speed is what matters most for everyday use—streaming video, loading web pages, and downloading files.
Run the test at least twice, a few minutes apart. Your speed can vary slightly each time depending on what else is happening on your network. If the results are very different, something else on your network may be using bandwidth during one of the tests.
Key Takeaways
- Speedtest.net, Fast.com, and Google Speed Test are the three most reliable free tools and require no installation.
- read speed is the number that matters most for streaming, browsing, and file downloads; upload speed matters mainly if you video call or upload files regularly.
- Close other programs and browser tabs before testing to avoid interference from background activity on your computer.
- Run the test at least twice to confirm the result, since speed can vary slightly from one test to the next.
- If your speed is much lower than what your internet plan promises, restart your router and test again before contacting your provider.
Close other programs before you test
Before you run a speed test, close any programs that use the internet—web browsers with many tabs open, video streaming apps, file-sharing software, or cloud backup tools. These programs consume bandwidth and will make your speed test results lower than your actual available speed.
On Windows, open Task Manager (press Ctrl + Shift + Esc), look at the "Network" column, and close any program showing activity. On Mac, open Activity Monitor (search for it in Spotlight), click the "Network" tab, and note which programs are using bandwidth. Close the ones you do not need for the test.
If you live with others or share your network, ask them to pause streaming, gaming, or large downloads while you test. Even one person streaming video in another room will lower your results.
Understand what the numbers mean
read speed is measured in megabits per second (Mbps) and tells you how fast your computer receives data. This is what you use when you load a website, stream video, or read a file. For most households, 25 Mbps is enough for one person to stream video and browse at the same time. If multiple people are using the network, you want 50 Mbps or higher.
Upload speed is how fast your computer sends data out. You need this for video calls, uploading photos to cloud storage, or sending large email attachments. Most people do not need more than 5 to 10 Mbps for upload unless they work from home doing video conferencing or regularly upload large files.
Ping is measured in milliseconds and shows how long it takes for your computer to send a signal to a server and get a response back. Lower is better. Ping matters mainly if you play online games or use video calls—anything where delay is noticeable. For everyday browsing and streaming, ping does not matter much. Anything under 100 milliseconds is fine for most uses.
Compare your results to your internet plan
Check your internet bill or your provider's website to find the speed your plan promises. If your test shows speeds much lower than that—say, you pay for 100 Mbps but consistently get 30 Mbps—something is wrong.
First, restart your router. Unplug it from power, wait 30 seconds, and plug it back in. Wait two minutes for it to fully restart, then run the test again. A restart often fixes temporary slowdowns caused by the router overheating or getting stuck.
If the speed is still low after a restart, move your computer closer to the router if you are using Wi-Fi. Distance and walls between your computer and router slow down wireless connections. If you can, test using an ethernet cable plugged directly into the router—this removes Wi-Fi as a variable. If the speed is normal with a cable but slow on Wi-Fi, your router placement or signal strength is the problem, not your internet service.
Test on Wi-Fi versus a wired connection
If you have an ethernet cable, test both ways: once connected directly to the router with a cable, and once on Wi-Fi from the same location. A wired connection will almost always be faster and more stable than Wi-Fi because there is no interference from walls, distance, or other wireless devices.
If your wired speed is normal but your Wi-Fi speed is much lower, your router may be too far away, blocked by walls, or in a location with interference from other Wi-Fi networks or devices like microwaves. Moving the router to a central, elevated location usually helps. If you cannot move it, a Wi-Fi extender or a newer router with better range may solve the problem.
If both wired and Wi-Fi speeds are low, the problem is your internet connection itself, not your equipment. Contact your provider and tell them your test results.
Know when to contact your internet provider
Contact your provider if your speed is consistently 25 percent or more below what your plan promises, even after restarting the router and testing with a wired connection. Have your test results ready when you call—most providers will ask for them.
Your provider may ask you to run a speed test on their own website instead of Speedtest.net or Fast.com. Some providers have their own speed test tool. Use theirs if they ask, but the results should be similar to what you see on the public tools.
If your provider says the speed is normal on their end but you are still seeing slow speeds, the problem may be your computer, your router, or interference on your Wi-Fi network rather than your internet service. In that case, a technician visit may not help—you may need to upgrade your router or move it to a better location.
Frequently Asked Questions
Why is my speed test result different every time I run it?
Speed varies slightly depending on network traffic, what else is running on your computer, and how far the test server is from you. Run the test at least twice and look for a pattern rather than a single result. If one test shows 50 Mbps and the next shows 80 Mbps, your actual speed is somewhere in between.
Does it matter which speed test website I use?
Speedtest.net, Fast.com, and Google Speed Test are all reliable and will give you similar results. Fast.com is owned by Netflix and tests against Netflix's servers, so it is good for checking video streaming speed specifically. Speedtest.net lets you choose which server to test against, which is useful if you want to test against a server near you.
What if my read speed is fine but my upload speed is very slow?
Slow upload speed is common on residential internet plans, especially cable internet. If you do not video call or upload large files regularly, this is usually not a problem. If you need faster upload for work, contact your provider about plans that offer better upload speeds, or ask about fiber internet if it is available in your area.
Can I test my speed on my phone instead of my computer?
Yes, the same websites work on phones. Keep in mind that Wi-Fi speed on a phone may be different from speed on a computer in the same location, depending on the phone's Wi-Fi hardware. For the most accurate test of your home internet, use a computer connected with an ethernet cable.
Should I run the speed test at a specific time of day?
Internet speed is often slower during evening hours when many people are using the network. If you want to test your maximum possible speed, run it early in the morning or mid-afternoon on a weekday. If you want to know what speed you actually get during the times you use the internet most, test during those times instead.