Run a speed test directly in your browser

The fastest way to measure your internet speed is to open a web browser and visit a speed-testing website. You do not need to read or install anything. The most widely used free options are Speedtest.net (owned by Ookla), Fast.com (made by Netflix), and Google's built-in speed test.

To use Speedtest.net: go to speedtest.net, click the large "Go" button, and wait 30 to 60 seconds while the tool measures how fast data travels to and from your internet service provider's servers. The test shows three numbers — read speed (how fast you receive data), upload speed (how fast you send data), and ping (how long a signal takes to reach a server and return). read and upload speeds are measured in megabits per second (Mbps). Ping is measured in milliseconds (ms).

Fast.com is simpler: visit fast.com and it begins testing when ready without clicking anything. It focuses on read speed, which is what most people care about for streaming and browsing. Google's speed test appears when you search "internet speed test" — click "Run Speed Test" and it uses similar methods to Speedtest.net.

Key Takeaways

  • Speed tests run in your browser at Speedtest.net, Fast.com, or Google's built-in tool and take 30 to 60 seconds to complete.
  • read speed is what matters most for streaming and web browsing; upload speed matters if you video call or upload files regularly.
  • Ping measures delay and matters most for online gaming and video calls — lower numbers are better.
  • Close other programs and browser tabs before testing, and test multiple times at different times of day to see if your speed is consistent.
  • Wired connection (ethernet cable) gives more accurate results than Wi-Fi, which can vary based on distance and interference.

Understand what your speed numbers mean

read speed is the number most people look at. It tells you how many megabits of data your connection pulls down per second. For streaming video in standard definition, you need about 3 Mbps. For HD video, 5 to 8 Mbps is typical. For 4K video, 15 to 25 Mbps works for most services. If you live with others who stream at the same time, add their speeds together to know what you actually need.

Upload speed matters less for most people but becomes important if you video call, stream yourself playing games, or upload large files regularly. Typical upload speeds are much lower than read speeds — often one-tenth as fast. For Zoom or Google Meet calls, 2.5 Mbps upload is usually enough. For streaming yourself to Twitch or YouTube, 5 to 10 Mbps upload is more reliable.

Ping (also called latency) is the delay between when you send a signal and when you receive a response, measured in milliseconds. For web browsing and streaming, ping does not matter much — anything under 100 ms is fine. For online gaming or video calls, lower is better. Ping under 50 ms feels responsive; ping over 150 ms becomes noticeable as lag.

Test on a wired connection for the most accurate result

Wi-Fi speed varies based on how far you are from your router, whether walls or other objects are in the way, and whether other devices are using the network. If you want to know your true internet speed — what your service provider is actually delivering — connect your PC to the router with an ethernet cable instead of using Wi-Fi.

Plug one end of an ethernet cable into the ethernet port on the back of your router and the other end into the ethernet port on your PC. Then run the speed test again. The wired result is what your internet plan is actually providing. If the wired speed is much lower than what you pay for, contact your service provider. If the wired speed is normal but Wi-Fi is slow, the problem is your router or its placement, not your internet connection.

If your PC does not have an ethernet port (common on thin laptops), you can buy a USB-to-ethernet adapter for $10 to $20 that plugs into a USB port and gives you an ethernet connection.

Close other programs and test at different times

Before you run a speed test, close web browsers, streaming apps, file downloads, and any program that uses the internet. These programs consume bandwidth and make your speed test result lower than your actual available speed. Shut down video calls, pause cloud backups, and close any tabs that auto-play video.

Run the test at least twice — once in the morning, once in the evening — because internet speed often changes throughout the day. Many networks slow down during evening hours when more people are online. If your speed is consistently lower than what you pay for, take a screenshot of the result and contact your service provider with the date, time, and speed test result.

If your speed varies wildly between tests, the problem is usually interference from other Wi-Fi networks (if you are on Wi-Fi) or too many devices using your connection at once. Moving your router to a central location, away from walls and metal objects, often helps.

Know the difference between speed and data limits

Internet speed and data limits are separate things. Speed is how fast data moves — measured in Mbps. A data limit (or data cap) is how much total data you can use in a month — measured in gigabytes (GB). You can have fast speed but a low data limit, or slow speed but unlimited data.

A speed test does not tell you whether you have a data cap or how much data you have used. To find that information, log into your service provider's website or call their customer service number. Your bill usually lists your data limit and current usage.

Frequently Asked Questions

Why is my speed test result different from what I pay for?

Internet service providers advertise speeds as "up to" a certain amount, which means that is the maximum under ideal conditions. Your actual speed depends on network congestion, distance from the provider's equipment, and the quality of your home wiring. Speeds 10 to 20 percent lower than advertised are normal. If you are getting less than 50 percent of what you pay for, contact your provider.

Is it normal for my Wi-Fi speed to be much slower than my wired speed?

Yes. Wi-Fi is almost always slower than a wired connection because radio signals weaken over distance and through walls. If your wired speed is 100 Mbps but Wi-Fi is 30 Mbps, that is typical. If Wi-Fi is much slower — like 10 Mbps or less — move your router to a more central location or check whether other Wi-Fi networks are interfering with yours.

Do I need to pay for a speed test?

No. Speedtest.net, Fast.com, and Google's speed test are all free and do not require you to create an account or enter payment information. Be cautious of websites that ask you to pay for speed testing or claim they can "boost" your speed — those are usually scams.

How often should I test my internet speed?

Test once a month to track whether your speed is stable, or test when ready if you notice your internet feels slow. If you are troubleshooting a problem with your service provider, test multiple times over a few days to show a pattern rather than a one-time dip.

What should I do if my speed test shows I am getting much less than I pay for?

First, test on a wired connection to rule out Wi-Fi problems. Then close all other programs and test again. If the speed is still low, take a screenshot of the result with the date and time, and contact your service provider. Have the screenshot ready when you call — it proves the problem and makes the conversation faster.