What actually slows down your internet

Your internet speed depends on three separate things: the speed your provider sends to your home, how many devices are using that connection at once, and what your equipment is doing with the signal. Most people assume the problem is their provider, but often it is something in your home you can fix in minutes.

The first step is to measure what speed you are actually getting. Go to speedtest.net or fast.com in your browser and run a test. Write down the download speed number. Then check your bill or log into your provider's website to see what speed you are paying for. If your test shows 50 Mbps and you pay for 100 Mbps, something between the wall and your device is the problem. If the test shows close to what you pay for, your provider is delivering what they promised — the slowness you feel is usually caused by too many devices online at once or a device that needs a restart.

Key Takeaways

  • Restart your modem and router by unplugging them for 30 seconds — this fixes slow speeds about half the time and takes two minutes.
  • Move your router to the center of your home and away from walls, metal objects, and microwaves, which physically block the wireless signal.
  • Disconnect devices you are not using from your Wi-Fi, since each one takes a share of your bandwidth even when sitting idle.
  • Switch to the 5 GHz band on your router if your device supports it, which is faster than 2.4 GHz but does not travel as far.
  • If your speed test shows you are getting less than half what you pay for, contact your provider — the problem is on their end.

Restart your modem and router

This sounds obvious, but restarting fixes slow internet about 50 percent of the time because modems and routers are small computers that get confused after running for weeks without a break. Unplug the modem (the box connected to the cable coming from the wall) and wait 30 seconds. Plug it back in and wait for the lights to stop blinking and settle into a steady pattern — usually two to three minutes. Then unplug the router (the separate box with antennas, or built into the modem) and wait 30 seconds. Plug it back in and wait for it to fully restart.

Do not just turn them off and on using a power button if they have one. Unplugging them completely clears their memory in a way a button press does not. After both devices have restarted, run another speed test. Many people see their speed jump back to normal after this step alone.

Move your router to a better location

Wi-Fi is a radio signal, and like any radio signal it gets blocked by walls, metal, and water. If your router is in a closet, behind the TV, or in a corner of your home, the signal has to travel through obstacles to reach you. Moving it to the center of your home and up off the floor — on a shelf or mounted on a wall — makes the signal reach farther and stronger.

Keep the router away from microwaves, cordless phones, baby monitors, and metal filing cabinets. These devices broadcast on the same 2.4 GHz frequency that most routers use and create interference that slows your connection. If you have a choice, place the router in an open area with clear line of sight to where you use your devices most. You do not need to hide it — it works better when visible.

Disconnect devices you are not actively using

Every device connected to your Wi-Fi — phones, tablets, smart TVs, security cameras, smart speakers — shares your bandwidth. Even when you are not using them, they are often running background updates, checking email, or syncing data. If you have ten devices on your network and only use two, the other eight are stealing speed from the two you care about.

Open your router's settings by typing 192.168.1.1 into your browser address bar (or check your router's label for the correct address). Log in with the password on the back of the router. Look for a section called "Connected Devices" or "DHCP Clients" and see what is online. Disconnect anything you do not recognize or do not use regularly. Forget the Wi-Fi network on old phones and tablets you no longer use. This alone can noticeably improve speed if you have many devices.

Switch to the 5 GHz Wi-Fi band

Most routers broadcast on two frequencies at once: 2.4 GHz and 5 GHz. The 2.4 GHz band travels farther and through walls better, but it is slower and more crowded because many devices use it. The 5 GHz band is faster but does not travel as far and gets blocked more easily by walls.

If your device is close to the router or in the same room, connecting to the 5 GHz network will usually feel faster. On your phone or computer, look for two Wi-Fi networks with the same name — one might say "MyNetwork" and one might say "MyNetwork-5G" or "MyNetwork-5GHz". Connect to the 5 GHz version. If your device does not show a 5 GHz option, it does not support that band and you are stuck with 2.4 GHz. Run a speed test after switching to see if it improves.

Check for background programs eating your bandwidth

On Windows, open Task Manager by pressing Ctrl+Shift+Esc. Click the "Performance" tab, then click "Open Resource Monitor" at the bottom. Look at the "Network" section and see which programs are using bandwidth. On Mac, open Activity Monitor (search for it in Spotlight), click the "Network" tab, and look for programs with high "Sent" or "Received" numbers.

Common culprits are Windows Update, cloud backup services like OneDrive or iCloud, streaming apps, and torrent clients. If you see something using a lot of bandwidth that you did not start, close it. Windows Update can be paused for a few hours if it is slowing you down — right-click the Windows logo, select "Settings", go to "Update & Security", and click "Pause updates for 7 days". This buys you time to finish what you are doing without the update running in the background.

Contact your provider if the problem is on their end

If your speed test shows you are getting less than half the speed you pay for — for example, you pay for 100 Mbps but consistently get 40 Mbps or less — the problem is likely with your provider's service, not your equipment. Before you call, run the speed test a few times at different times of day and write down the results. Also note whether you tested on Wi-Fi or plugged directly into the modem with an ethernet cable (wired tests are more accurate).

Call your provider's customer service number on your bill. Tell them your paid speed, your test results, and ask them to check the signal strength coming into your modem. They can often see this remotely. If the signal is weak, they may send a technician to check the line outside your home. If the signal is strong but your speed is still low, ask them to restart your modem from their end or replace it if it is old. Document everything they tell you in case you need to follow up.

Frequently Asked Questions

Why is my internet slow only at certain times of day?

Your neighborhood's network gets congested during peak hours — usually 7 to 11 p.m. when many people are streaming video or gaming. This is a provider problem, not something you can fix at home. If slowness happens only at night, your provider's network is overloaded. If it happens all day, the problem is your equipment or your home setup.

Does changing my Wi-Fi password help speed?

Only if someone outside your home is using your Wi-Fi without permission. If your network is secure and only your devices are connected, changing the password will not change your speed. Check your connected devices list first to see if anything unknown is online.

Will a new router make my internet faster?

Only if your current router is very old (more than five years) or broken. A new router will not make your provider send faster speeds — it can only receive what they send. If your speed test shows you are getting the speed you pay for, a new router will not help. If you are getting less, fix the problems above first before spending money on new equipment.

Is ethernet cable faster than Wi-Fi?

Yes, ethernet is always faster and more stable than Wi-Fi because it is a direct wired connection with no interference. If you have a desktop computer or a device you do not move around, plugging it in with an ethernet cable will give you the full speed your provider sends. Wi-Fi will always be slightly slower due to distance and obstacles.

What speed do I actually need?

For one person browsing and email, 10 to 25 Mbps is enough. For streaming video in HD, you need 5 to 10 Mbps per stream. For gaming, 15 to 25 Mbps works well. If you have four people online at once doing different things, aim for 100 Mbps or higher. Your provider can tell you what speed tier you are paying for.