What actually slows down your internet, and what you can fix

Internet speed depends on three separate things: the speed your provider sends to your home, the devices and cables inside your home, and what is running on your network right now. You can control the second and third. The first — your plan speed — you cannot change without calling your provider or switching to a different one.

Most people who think they have a speed problem actually have a signal problem. Your router is too far away, too many walls are in the way, or too many devices are connected at once. These are fixable without spending money. Before you do anything else, restart your router by unplugging it for 30 seconds, then plugging it back in. This clears its memory and often restores speed that has drifted down over weeks or months.

If restarting does not help, the next step is to measure what speed you are actually getting. Go to speedtest.net or fast.com on a device connected by ethernet cable directly to your router — not WiFi. Write down the download speed. This is your real speed. If it matches what your provider promised, your internet is working correctly and the slowness is somewhere else. If it is much lower, your provider may have an issue or your plan may be oversold.

Key Takeaways

  • Restart your router first — unplug it for 30 seconds and plug it back in, which fixes most temporary slowdowns.
  • Test your speed with an ethernet cable directly to your router to see your actual speed, then compare it to what your provider promised.
  • Move your router to a central, high location away from walls and metal objects, and keep it away from microwaves and cordless phones.
  • Close background apps and browser tabs that use the internet, and check whether a single device is hogging bandwidth.
  • If your measured speed is much lower than your plan speed, contact your provider to report the problem or ask whether your area is congested.

Position your router for better signal reach

A router sends signal in all directions, but walls, metal, and distance weaken it. The best location is central and high — on a shelf or wall mount in the middle of your home, not in a corner or closet. Avoid placing it inside a cabinet, under a desk, or next to a microwave or cordless phone, all of which block or interfere with the signal.

If your router is in a basement or far from where you use the internet most, moving it may help more than anything else. Even moving it from a closet to an open hallway can double the speed you see on WiFi. If you cannot move the router itself, you can add a WiFi extender or mesh system to reach dead zones, though this trades some speed for coverage.

Reduce the number of devices and apps using your network

Every device connected to your WiFi shares the same bandwidth. If you have ten devices streaming video, downloading files, or running background updates, each one gets a smaller slice. Close apps you are not using, especially streaming services, cloud backup, and automatic updates. On your phone or computer, go to Settings and turn off background app refresh for apps that do not need it.

Check which devices are actually connected. Most routers have an app or a web interface where you can see connected devices. If you see devices you do not recognize, they may be your neighbors' devices picking up your signal, or old devices you forgot about. Remove them by changing your WiFi password to something strong — at least 12 characters with numbers and symbols — and reconnecting only the devices you use.

If one device is using most of the bandwidth, unplug it or disconnect it from WiFi while you test the others. Video streaming, large downloads, and online games use the most bandwidth. If someone in your home is streaming 4K video while you are trying to work, that is the problem, not your internet plan.

Switch to a wired connection for devices that matter

WiFi is convenient but slower and less stable than an ethernet cable. If you use a desktop computer, smart TV, or gaming console, plug it directly into your router with an ethernet cable. You will see faster speeds and fewer interruptions. Ethernet cables are cheap — under $10 for a 25-foot cable — and work through walls if you run them along baseboards or through conduit.

If running a cable is not practical, a powerline adapter lets you send internet through your home's electrical wiring. Plug one adapter into an outlet near your router and connect it to your router with ethernet. Plug the second adapter into an outlet near the device you want to connect. This is slower than a direct cable but faster and more stable than WiFi, and it works even if walls are in the way.

Check for malware and unwanted background activity

Malware, viruses, and unwanted software can use your internet in the background without you knowing. Run a full scan with your antivirus software — Windows Defender is built into Windows, and macOS has XProtect built in. If you use a third-party antivirus, run a full system scan, not a quick scan.

On Windows, open Task Manager by pressing Ctrl+Shift+Esc, click the Performance tab, and look at Network usage. If it shows high activity when you are not doing anything, something is running in the background. Click the Processes tab to see which programs are using the network. Close anything you do not recognize or do not need.

On Mac, open Activity Monitor from Applications > Utilities, click the Network tab, and sort by Sent Bytes. Programs at the top are using the most bandwidth. If you see something unfamiliar, search for it online before closing it — some system processes have confusing names.

Update your router firmware and check for interference

Router manufacturers release firmware updates that fix bugs and improve performance. Log into your router's settings page — usually 192.168.1.1 or 192.168.0.1 in your browser — and look for a System or Administration section. Check for available updates and install them. This takes a few minutes and your internet will go down briefly.

If you live in an apartment or a dense neighborhood, other WiFi networks on the same channel as yours can slow you down. Download a WiFi analyzer app like WiFi Analyzer for Android or iStumbler for Mac. It shows which channels other networks are using. Log back into your router settings and change your WiFi channel to one that is less crowded. The 5 GHz band has more channels and less interference than 2.4 GHz, so if your router supports it, use that instead.

Know when to contact your provider or upgrade your plan

If you have done all of the above and your measured speed is still much lower than what your provider promised, contact them and report the problem. Have your speed test results ready. They may find an issue on their end, send a technician, or offer you a different plan.

If your measured speed matches your plan speed but you still feel like things are slow, your plan may not be fast enough for what you are doing. Streaming 4K video, video calls, and online gaming all need at least 25 Mbps. If you have multiple people in your home doing these things at once, you may need 100 Mbps or more. Check what speed you have, then decide whether upgrading makes sense for your budget.

Some areas have only one provider, so you cannot switch. Others have cable, fiber, DSL, and satellite options. If your current provider cannot deliver the speed you need, search for other providers in your area by entering your address on broadbandnow.fcc.gov or your provider's website.

Frequently Asked Questions

Why is my WiFi fast on my phone but slow on my computer?

Your phone is probably closer to the router or in a better position. Move your computer closer to the router, or switch it to an ethernet cable. If the computer is far away, a WiFi extender or mesh system can help. You can also check whether your computer is running background downloads or updates — Windows and Mac both do this automatically.

Does restarting my router really help, or is that just a myth?

It really helps. Routers store temporary data in memory, and over time this can slow them down or cause connection drops. Restarting clears this memory. Most people should restart their router once a month, or whenever they notice slowness. It takes 30 seconds and fixes the problem more often than anything else.

What is a good internet speed?

For one person browsing and checking email, 10 Mbps is enough. For streaming video, you need at least 25 Mbps. For multiple people streaming, video calls, and gaming at the same time, 100 Mbps is safer. If you have fiber available, 500 Mbps or 1000 Mbps plans are common and cost only slightly more than 100 Mbps plans.

Can I use a WiFi extender instead of moving my router?

Yes, but it trades speed for coverage. An extender picks up your WiFi signal and rebroadcasts it, but this uses half your bandwidth. A mesh system is better — it uses multiple units that talk to each other and maintain full speed throughout your home. Mesh systems cost more but work much better if you have a large home or thick walls.

Is satellite internet as fast as cable or fiber?

No. Satellite internet has higher latency — the delay between sending a request and getting a response — which makes video calls and gaming feel sluggish even if the download speed looks good on a test. Cable and fiber are much better for these uses. Satellite is mainly useful in rural areas where cable and fiber are not available.