What actually slows your internet down

Your internet speed depends on three things: the connection your provider sends to your house, how well your equipment handles it, and what else is using the bandwidth right now. Most people assume they need a faster plan, but often the problem is one of the other two. A device sitting too far from your router, a neighbor's network interfering with yours, or six people streaming video at once will all make your connection feel slow — even if your plan is fast.

Before you call your provider or buy new equipment, you need to know which of these three is actually the bottleneck. That is why the measurement article you came from matters: if your speed test shows you are getting what you pay for, the problem is not your plan. If it shows you are getting half what you pay for, the problem is your equipment or interference.

Key Takeaways

  • Move your router to a central, elevated location away from walls and metal objects, which can cut your speed in half without you changing anything else.
  • Restart your modem and router by unplugging them for 30 seconds — this clears temporary slowdowns that build up over days or weeks.
  • Check what devices are connected and using bandwidth; a single person streaming 4K video can consume what five people need for browsing.
  • Switch to the 5 GHz band on your router if your device supports it, which is faster over short distances but does not travel through walls as well.
  • If speed tests show you are getting half your plan's speed consistently, contact your provider to check the line — the problem may be outside your house.

Restart your modem and router the right way

A restart clears temporary slowdowns that build up over days or weeks. Most people do this wrong: they flip the power switch and turn it back on when ready. That does not work. You need to unplug the device, wait 30 seconds, and plug it back in. The 30 seconds matters because it drains the device's memory completely.

Unplug your modem first, then your router. Wait 30 seconds. Plug the modem back in and wait for all its lights to stabilize — usually two to three minutes. Then plug in the router and wait another two to three minutes. Do not touch anything while they are starting up. Run a speed test after this and compare it to your previous result. Many people see a noticeable improvement, especially if they have not restarted in weeks.

Move your router to a better location

Router placement matters more than most people realize. A router in a closet, behind a TV, or in a corner of your house will deliver much slower speeds to the rest of your home than one in the center. Walls, especially those with metal studs or pipes, block the signal. Distance also matters: every 10 feet away from the router, your speed drops.

The best location is central and elevated — on a shelf or wall mount in the middle of your home, not on the floor. Keep it away from microwaves, cordless phones, and baby monitors, which broadcast on the same 2.4 GHz frequency and cause interference. If your router has antennas, position one vertically and one horizontally; this helps devices receive the signal from different angles. If you cannot move the router to a central spot, a mesh system (two or three units that work together) can cover your whole home better than a single router in a corner.

Switch to the 5 GHz band if your device supports it

Most routers broadcast on two frequencies: 2.4 GHz and 5 GHz. The 2.4 GHz band travels through walls better but is slower and more crowded — your neighbors' networks are probably on it too. The 5 GHz band is faster but does not travel as far and does not go through walls well. If you are in the same room as your router or one room away, switching to 5 GHz will usually feel noticeably faster.

Check your router's settings by opening a web browser and typing the router's IP address (usually 192.168.1.1 or 192.168.0.1 — check the sticker on the back). Log in with the password on the sticker. Look for wireless settings or network name settings. You should see two network names listed, or one name with a choice of bands. Your device will show both networks available. Connect to the one ending in 5G or 5GHz. If your device does not show a 5 GHz option, it does not support that band and you cannot use it.

Check what is using your bandwidth right now

One device streaming 4K video uses as much bandwidth as five people browsing the web. If your household has multiple people online, someone might be consuming most of the available speed without realizing it. Check what is connected to your network and what it is doing.

Log into your router the same way you did above (IP address in a browser). Look for a section called Connected Devices, Device List, or DHCP Clients. You will see every device on your network. If you see devices you do not recognize, they may be your neighbors' devices picking up your network, or they may be devices in your house you forgot about. Look for anything labeled as a streaming device, security camera, or smart TV — these use the most bandwidth. Ask the people in your house if anyone is streaming video, downloading large files, or playing online games. If so, ask them to pause or stop while you run a speed test. If your speed improves significantly, you know the problem is bandwidth competition, not your connection.

Check for interference from nearby networks

If many networks are broadcasting on the same channel in your area, they interfere with each other and slow everyone down. This is especially common in apartments and dense neighborhoods. You can see what channels your neighbors are using and switch to a less crowded one.

On Windows, open Command Prompt and type netsh wlan show networks mode=Bssid. On Mac, hold Option and click the Wi-Fi icon in the menu bar, then look at the Channel column. You will see a list of networks and the channels they use. Channels 1, 6, and 11 are the only ones that do not overlap on 2.4 GHz. If most networks around you are on channel 6, try switching your router to channel 1 or 11. For 5 GHz, there are many more channels and overlap is less common, so interference is usually not the problem there. Log into your router settings, find the wireless channel setting, and change it. Wait a few minutes and run a speed test to see if it improves.

When to contact your provider

If you have restarted your equipment, moved your router to a central location, checked for interference, and your speed test still shows you are getting significantly less than what you pay for — say you pay for 100 Mbps but consistently get 40 or 50 — the problem is likely on your provider's side. This could be a problem with the line coming into your house, the equipment they installed, or congestion in your neighborhood.

Call your provider and tell them your speed test results. Have the results ready to share. Ask them to run a line test from their end. Many providers can see problems on the line that your equipment cannot. If they find a problem, they will send a technician or replace the equipment they provided. If they do not find a problem, ask them to check the modem they provided — sometimes a modem that is several years old cannot handle newer speeds even if your plan supports them.

Frequently Asked Questions

How often should I restart my modem and router?

Once a month is a good habit, or whenever you notice your speed dropping. Some people restart weekly. You do not need to do it more often than that unless you are having constant problems. If you find yourself restarting more than once a week to get normal speeds, contact your provider — something is wrong with the line or equipment.

Will a new router make my internet faster?

Only if your current router is very old (more than five years) or if your provider's equipment is the bottleneck. If speed tests show you are getting the speed you pay for, a new router will not help. If tests show you are getting less, try the steps above first — a new router costs money and often is not the problem.

Does the position of my router's antennas matter?

Yes. One vertical and one horizontal gives the best coverage because different devices receive signals at different angles. Some routers have three antennas — position one vertically and angle the other two at 45 degrees. Experiment and run speed tests from different rooms to find what works best in your space.

Can I use both 2.4 GHz and 5 GHz at the same time?

Yes. Your router broadcasts both simultaneously. Devices closer to the router or in the same room should connect to 5 GHz for speed. Devices far away or in other rooms should use 2.4 GHz because it travels through walls better. You can give them the same network name so devices switch automatically, or separate names so you can choose which band each device uses.

What speed should I expect from my router?

Your actual speed depends on your plan, your distance from the router, and interference. A speed test should show close to what your provider says you are paying for. If you pay for 100 Mbps, expect 80 to 100 Mbps on a wired connection and 60 to 90 Mbps on Wi-Fi near the router. Farther away or through walls, expect 30 to 60 Mbps. If you are getting much less, use the steps above to troubleshoot.