The fastest way to check your internet speed
Open a web browser on your computer and go to speedtest.net or fast.com. Both sites run a speed test automatically when you land on the page — you do not need to read anything or create an account. Click the large button in the center of the screen, wait 30 to 60 seconds while the test runs, and you will see three numbers: read speed, upload speed, and ping (measured in Mbps and milliseconds). That is your internet speed.
The test works by sending data from your computer to a server and back, measuring how much data moves in each direction. Your results show what your connection can actually do right now, not what your internet plan promises. Speed varies by time of day, how many devices are using your network, and what else is running on your computer.
Key Takeaways
- Speedtest.net and fast.com are free websites that measure your read speed, upload speed, and ping in under a minute with no sign-up required.
- Close other programs and browser tabs before testing so they do not use bandwidth and skew your results lower.
- Run the test at different times of day to see whether your speed changes, which helps you spot patterns or problems.
- read speed is what matters most for streaming and browsing; upload speed matters if you video call or upload files regularly.
- If your speed is much lower than your plan promises, restart your router and run the test again before contacting your internet provider.
Understanding what the numbers mean
read speed is how fast data comes to your computer. This is the number most people care about because it affects streaming video, loading web pages, and downloading files. Speeds are measured in Mbps (megabits per second). For basic web browsing and email, 10 Mbps is enough. For streaming video in standard definition, you need about 5 Mbps. For 4K video, 25 Mbps or higher works better.
Upload speed is how fast data leaves your computer. This matters if you video call, upload photos to cloud storage, or send large files. Most people need 2 to 5 Mbps for video calls. Upload speed is usually much lower than read speed on home internet plans, and that is normal.
Ping is the time it takes for data to travel to a server and back, measured in milliseconds. Lower ping is better. Ping matters most for online gaming and video calls — anything where you need a quick response. For gaming, under 50 ms is good. For video calls, under 100 ms is fine. Ping does not affect streaming or browsing much.
Preparing your computer for an accurate test
Before you run a speed test, close other programs that use the internet. This includes streaming apps, cloud backup software, downloads, and browser tabs with videos or music playing. Even one video streaming in another tab can lower your test results by 20 to 30 percent. If you share your network with other people, ask them to pause their internet use for a few minutes while you test.
Use a wired connection if you can. Plug an ethernet cable directly from your router into your computer's network port. Wifi is convenient but slower and less stable than a wired connection, so your wifi speed test will show lower numbers than what a wired test would show. If you only have wifi, move your computer as close to the router as possible and make sure nothing is blocking the signal.
Restart your router before testing if your speed seems unusually low. Unplug the power cable, wait 30 seconds, and plug it back in. Let it fully restart (usually 2 to 3 minutes) before running the test. A restart clears temporary problems that slow your connection.
Running the test step by step
Go to speedtest.net in your web browser. The page loads with a large blue button labeled "Go" in the center. Click it. The test will start automatically and show a progress bar. Do not close the browser tab or move your mouse while the test runs — let it finish on its own.
The test first measures your read speed (usually 10 to 20 seconds), then your upload speed (another 10 to 20 seconds), then your ping. When all three are done, the page shows your results in large text. Below that, you will see your internet provider's name, your server location, and a detailed breakdown of your results.
Write down your numbers or take a screenshot. If you test again later and get very different results, you have proof that something changed. Some people test once a week at the same time of day to track patterns.
What to do if your speed is lower than expected
If your test shows much lower speed than your internet plan promises, restart your router first. Unplug it for 30 seconds, plug it back in, and wait for it to fully restart. Then run the test again. Many slow-speed problems go away after a restart.
If the speed is still low, check whether other devices are using your network. Ask people in your home to disconnect from wifi temporarily, or check your router's settings to see what devices are connected. Streaming, gaming, or large downloads on other devices will lower your test results.
If you are using wifi, move closer to your router or switch to a wired connection. Walls, distance, and interference from other devices slow wifi. If a wired test shows normal speed but wifi is slow, the problem is your wifi signal, not your internet plan.
If your speed is still much lower than your plan after restarting your router and testing on a wired connection, contact your internet provider. Tell them your plan speed, your test results, and that you tested on a wired connection. They may be able to troubleshoot further or send a technician.
Other free speed test websites
Fast.com is owned by Netflix and focuses on read speed only. It is simpler than Speedtest.net and runs very quickly — usually under 30 seconds. Use it if you just want a quick check of your read speed.
Speedtest.net is more detailed. It shows read, upload, and ping, and lets you choose which server to test against. You can also see your test history if you create a free account, which is useful if you want to track your speed over weeks or months.
Both sites work the same way: open the page, click the button, and wait for results. Neither requires payment or personal information. Pick whichever one you prefer — the results will be similar.
Frequently Asked Questions
Why do I get different speeds when I test multiple times?
Internet speed varies throughout the day depending on how many people are using your network and your internet provider's network. Test at the same time each day if you want to compare results. If one test is much slower than others, restart your router and test again — temporary slowdowns are common and usually fix themselves.
Is my speed good enough for streaming video?
For standard definition streaming, you need about 5 Mbps. For high definition (HD), aim for 10 to 15 Mbps. For 4K video, 25 Mbps or higher works better. If you stream on multiple devices at the same time, add 5 Mbps for each extra device. Your read speed from the test tells you whether you have enough.
Does wifi speed test differently than a wired connection?
Yes. Wifi is usually 20 to 40 percent slower than a wired connection because of distance, walls, and interference. If you want to know your true internet speed, test on a wired connection. If you want to know your actual wifi speed, test on wifi — that is the speed you will get when using your devices wirelessly.
What does ping mean and why does it matter?
Ping is how long it takes for data to reach a server and come back, measured in milliseconds. It matters for online gaming and video calls because high ping causes lag — your actions take longer to show up. For gaming, under 50 ms is ideal. For video calls, under 100 ms is fine. Ping does not affect streaming or web browsing much.
Can I test my speed on my phone instead of my computer?
Yes. Open speedtest.net or fast.com on your phone's web browser and run the test the same way. Keep in mind that phone speed tests show your wifi or mobile signal speed, not your home internet plan speed. If you want to test your home internet, use a computer connected to your home wifi or router.