The fastest way to measure your speed

Open a web browser on any device connected to your home Wi-Fi, go to speedtest.net or fast.com, and click the button to start the test. Within 30 to 60 seconds, you will see three numbers: read speed (how fast data comes to you), upload speed (how fast data goes out), and ping (how long it takes for a signal to reach a server and come back). Write these numbers down so you can compare them later or share them with your internet provider if something seems wrong.

Both sites are free and do not require you to create an account. Speedtest.net shows more detail about your connection, while fast.com is simpler and faster to run. Either one gives you accurate results for what you need to know about your home internet.

The test works best when you are the only person using the internet at that moment. If someone else is streaming video, downloading files, or playing online games while you test, the numbers will be lower than your actual speed. Close other browser tabs and ask anyone else in the house to pause their activity for a few minutes.

Key Takeaways

  • Speedtest.net and fast.com are the two most common free tools and give results in under a minute.
  • Run the test when no one else is using the internet, because other activity will lower your numbers.
  • Write down your read speed, upload speed, and ping so you can track changes or show your provider.
  • Test from the same spot each time — moving closer to or farther from your router changes the results.
  • If your speed is much lower than what your provider promised, test again at different times of day before contacting them.

Where to run the test for the most honest result

The location where you test matters more than most people realize. If you are sitting 30 feet away from your router with a wall between you and it, your speed will be lower than if you are in the same room. For the most useful measurement, test from the spot where you actually use the internet most — if you work from your kitchen table, test there. If you stream video from your bedroom, test there.

This gives you a real picture of the speed you actually experience. If you want to know the maximum speed your internet connection can deliver, test from the same room as your router, or plug your computer directly into the router with an ethernet cable. That result tells you what your provider is actually sending to your home. The difference between that number and the number from across the house tells you how much your Wi-Fi is slowing things down.

What the three numbers mean

read speed is measured in megabits per second (Mbps) and tells you how fast you can pull information from the internet — watching videos, loading web pages, downloading files. Most people need 25 Mbps or higher for smooth streaming and web browsing. If you have multiple people in your house streaming at the same time, you want 50 Mbps or higher.

Upload speed is also in Mbps and tells you how fast you can send information out — uploading photos, video calling, sending large email attachments. Most people need 5 to 10 Mbps for these tasks. If you work from home and video call all day, you want at least 10 Mbps upload.

Ping is measured in milliseconds (ms) and shows how long it takes for your device to send a signal to a server and get a response back. Lower is better. For web browsing and streaming, anything under 100 ms is fine. For online gaming or video calls, you want under 50 ms. If your ping is very high (over 150 ms), your video calls will feel delayed and games will feel sluggish.

Why your speed changes from day to day

Internet speed is not always the same. Time of day matters — evenings between 7 and 10 p.m. are usually slower because more people in your neighborhood are using the internet at once. Weather can affect it too, especially if you have cable internet. Your own Wi-Fi signal gets weaker when more devices are connected or when someone is using a microwave or cordless phone nearby (they broadcast on the same frequency as Wi-Fi).

This is why running the test once is not enough to know if there is a real problem. If you think your speed is too low, test at different times — morning, afternoon, and evening — and test from the same spot each time. If the speed is consistently lower than what your provider promised, then you have something to report. If it is only slow at certain times, the problem is usually network congestion, not your connection.

Testing with a wired connection versus Wi-Fi

Wi-Fi is convenient but slower than a wired connection. If you plug your computer directly into your router with an ethernet cable, you will see your true internet speed. If you test over Wi-Fi from across the room, you will see a lower number — that is normal and expected.

Run both tests if you want to know how much Wi-Fi is slowing you down. The wired test shows what your provider is delivering. The Wi-Fi test shows what you actually get in the room where you use it. If the wired speed matches your provider's promise but the Wi-Fi speed is much lower, your router may be old or positioned poorly. If both are much lower than promised, the problem is with your internet connection itself, not your Wi-Fi.

What to do if your speed is lower than expected

First, restart your router. Unplug it for 30 seconds, plug it back in, and wait two minutes for it to fully restart. Then run the speed test again. This fixes slow internet about half the time and costs nothing.

If the speed is still low, test again at a different time of day. If it is only slow in the evening, the problem is likely network congestion in your area, not your connection. If it is slow all day, every day, and much lower than what your provider promised, contact your provider and tell them the speed you measured. Have the numbers from your test ready. They may ask you to test again while on the phone with them, or they may send a technician to check the line coming into your house.

Frequently Asked Questions

Does it matter which speed test site I use?

Speedtest.net and fast.com are both reliable and will give you similar results. Speedtest shows more information and lets you see your history over time. Fast.com is simpler and runs faster. Pick whichever you prefer — the numbers will be nearly the same either way.

Why is my upload speed so much lower than my read speed?

Most home internet plans are designed for downloading — streaming, browsing, downloading files — so providers give you much more read speed than upload. This is normal. If you need faster upload for work, you may need a different type of internet service, and your provider can tell you what is available at your address.

Can I test my phone's internet speed the same way?

Yes. Open a browser on your phone, go to speedtest.net or fast.com, and run the test. You will see the speed of your phone's Wi-Fi connection. If you want to test your phone's cellular data (4G or 5G), turn off Wi-Fi first, then run the test. The cellular speed will usually be lower than your home Wi-Fi.

What should I do if my speed test keeps getting interrupted?

Close other browser tabs and apps running in the background. If someone else is using the internet heavily, ask them to pause. If the test keeps failing even when you are the only one online, try a different speed test site. Occasionally a test will fail due to a temporary problem with the testing server, not your internet.

How often should I test my internet speed?

Test once a month or whenever you notice your internet feels slow. Keep a straightforward list of the dates and speeds so you can spot trends. If your speed drops suddenly or stays consistently lower than your provider promised, that is when to contact them with your test results.